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.

Across 1 A roast's cooking vessels 5 I have admitted to most unusual incentives 11 Frame pair from “Treasure Island” 12 Provide angle describing vase 13 After the deadline, clutching cast, care for cut 16 Riding in parade to capital of Yukon Territory under sovereign rule 18 Couple of members from Western Hotspur I approach (2 wds) 21 Loop back, before long, to east 22 See instructions 23 Fuel is pink, not red 27 Confront a riot overwhelming a Canadian province 29 More than one who loves a party errs badly 31 Tell the cops about cut-back company's covering up, in a way 32 Taking steps, make an impression encompassing a new car's debut 33 Monitoring device involving one area of expertise 34 Retreating river creatures keeping time with music's closing passage 35 Ask questions about Old Sod's versification study

Down 1 A cat's tiny building block 2 Lowest deck's swimming pool holding last of water 3 Wild man-eater I bring back to life 4 Adjusts for stumbles, without fail 6 Frontier settlement to spout off 7 Pay for mashed tater 8 Revolutionary riled fine base guard? 9 Reportedly, Cockney man spotted Biblical character 10 Those influencing quiet mimics 14 One who can't remember cinema as funny 15 Getting wider street accepted by actress Annette 17 Ian initially completely absorbed by computer company's device 19 Air conditioner wires for certain Hondas 20 Department welcomes one neutral testifier 24 See, I pose behind entrance to vault 25 Dove sometimes left out of icebox 26 Pressed and erased all but the first 28 Trim cattle 30 Agile agent captures radical

Solution