First Off
by Kegler

Nine pairs of entries conflict in a manner suggested by the title. In each case, one of the letters will make a
word (or name) both ways, and should be entered into the grid; the others, when read in clue order, will   
spell out an apt two-word phrase. Answers include five proper nouns, and two other non-MW words.    

First Off grid

Across
1Tempting sale initially evoking... (8)
6...upscale shop in disarray (4)
9We're holding on, returning before today (6)
11Stop at end of line; really? (5)
12Zen, see, reproduced allergic reaction (6)
13Perhaps mite ate four (7)
14Charlie Parker's English girl (4)
15Pressing man from ancient town (6)
16Angela redistributed lead ore (6)
17Ship's platform in favor of alien work (7)
22A ruler's bizarre, having a strange, dreamlike quality (7)
26Experts holding me back for introductions (6)
28Stooge keeps Ron confused with Marilyn (6)
30Yorkshire's team experiences pause in scoring (4)
31Fasten English river transport (7)
32Carson refurbished oak products (6)
33Wheat cloys, oddly, with lots of moisture (5)
34Listen, maybe, and join up (6)
35Scan article in color (4)
36They panicked the French with a couple of whiffs of nerve gas (8)
Down
1Broken antler is item that must be returned (6)
2Leader who incites hound trapping retreating prey (7)
3Pastor at a wedding, perhaps, reconsidering Triune (6)
4To the auditor, vouches in writing for mathematical functions (7)
5All stay in metaphysical external world (6)
6Indian sees blue rippling in Italian flower (6)
7Duck around nurse after ending to “love everlasting” (7)
8Apply a dye heavily in mirror, revealing one's successful age (6)
10Less polite, heartless one showing regret (4)
11Actress Ward drinks up (4)
17Predict charge with metallic rocks (7)
18Or go back east, to New York mountain formation (7)
19A realm I restored in Wyoming town (7)
20Start to stretch, bend backwards, and still, finally, sit in an awkward position (6)
21Note: one of the aged provided repetition (6)
23Letters from spouse nettled on-line community (6)
24Sign up distressed loner starting to leave (6)
25Dainty favorite that has touch of enamel (6)
27Not any tangled yarn (4)
29Jeff's going topless for Final Four, initially (4)

Solution