Under Pressure
by Kegler

Some entries will only fit if two letters are squeezed into one square.  In each case, two letters from the crossing word must also be squeezed into that square.
In each case, the two Across letters followed by the two Down letters will form a four-letter word, as described by 22 Across.

Under Pressure grid

Across
1A roast's cooking vessels
5I have admitted to most unusual incentives
11Frame pair from “Treasure Island”
12Provide angle describing vase
13After the deadline, clutching cast, care for cut
16Riding in parade to capital of Yukon Territory under sovereign rule
18Couple of members from Western Hotspur I approach (2 wds)
21Loop back, before long, to east
22See instructions
23Fuel is pink, not red
27Confront a riot overwhelming a Canadian province
29More than one who loves a party errs badly
31Tell the cops about cut-back company's covering up, in a way
32Taking steps, make an impression encompassing a new car's debut
33Monitoring device involving one area of expertise
34Retreating river creatures keeping time with music's closing passage
35Ask questions about Old Sod's versification study
Down
1A cat's tiny building block
2Lowest deck's swimming pool holding last of water
3Wild man-eater I bring back to life
4Adjusts for stumbles, without fail
6Frontier settlement to spout off
7Pay for mashed tater
8Revolutionary riled fine base guard?
9Reportedly, Cockney man spotted Biblical character
10Those influencing quiet mimics
14One who can't remember cinema as funny
15Getting wider street accepted by actress Annette
17Ian initially completely absorbed by computer company's device
19Air conditioner wires for certain Hondas
20Department welcomes one neutral testifier
24See, I pose behind entrance to vault
25Dove sometimes left out of icebox
26Pressed and erased all but the first
28Trim cattle
30Agile agent captures radical

Solution