Buckle when fighting under pressure? The opposite (4)
I believe the answer is:
warp
'buckle' is the definition.
(I know that buckle can be written as warp)
'fighting under pressure? the opposite' is the wordplay.
I cannot really understand how this works, but
'fighting' could be 'war' and 'war' is found within the answer.
'pressure?' could be 'p' (abbreviation) and 'p' is present in the answer.
This accounts for all the letters.
This explanation may well be incorrect...
'when' acts as a link.
Can you help me to learn more?
(Other definitions for warp that I've seen before include "Go out of shape" , "Abnormality in character" , "Crane fly larva" , "Become twisted" , "Distort, ship's rope" .)