Long Weekend
by Kegler

Ten answers become different words before entry; the unclued center entry explains how to modify them.

Across 1 Diagram describing his bad accident 7 Accent small hair sample 11 Cain's son brought back piece of his ice cream container 12 Signs of elected officials keeping track, finally 13 Carrying on parade for leader 14 Both sides embracing one recluse 15 Light and furry, not hot 17 Hooligan jailbird conceals Mary Jane 18 Easily crushed myth surrounding Rhode Island 19 Injured ewe beginning to plaintively cry 20 Rich doctor acquires one pair of yearlings 22 Mildly deranged group returning to club 26 Certain keyboardist's bizarre ruse 28 Lucy's mate gripped by altitude sickness 29 See instructions 31 Start to overcorrect and turn right in curve 33 Sell victuals, at first, then stop 36 Cloisters' cooks adopting excited air 38 One learning from fall of Troy 40 Submit chapter depicting desire 42 Bringing back guns for deer 43 Elliptical space behind band 45 Issue of “Time” sent back 46 Reportedly seals up lakes 47 Spirit of Twisty Lane 48 Run away from insect, we hear 49 Fearsome at first, more dangerous and more lively 50 Poke holes in puzzle 51 Members of joints playing nonets

Down 1 Destroy germ with last of antidote blend 2 Things that are embedded in songs 3 Orbiter circling back of sun; thus, strong wind 4 Leading one had written about episode's finale 5 Ramble around one Raider 6 Complete transformation of venue, a bit drab 7 Adept seamstress finally stopped 8 Every other greasy spoke 9 Seer misinterpreted Celtic language 10 Boost crazy pol wearing dress 16 Fiddles with thousand in funds 21 Glacial ridge reeks badly 23 Ring operated in Algerian port 24 Blossom like a worker? 25 Better amortize, mister 27 Eye sore sounds like an eyesore 30 It's back in tunnel with enemy 32 Destiny involving truck and ship 34 Legate's funny bald baby? 35 A siren scrambled out of bed 37 Stooge captures confused goons with ferret-like mammal 39 Fragrances from cedarwood or sandalwood 41 Roue hugs lass, initially wearing clothes 44 River circles around Hawaii 45 Cruel person entertaining rare pal

Solution