In wrestling, put up with the pressure (4,3)
I believe the answer is:
bear hug
'in wrestling' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I don't see?
'put up with the pressure' is the wordplay.
'put up with' becomes 'bear' (synonyms).
'the pressure' becomes 'hug' (I can't explain this - if you can you should believe this answer much more).
'bear'+'hug'='BEAR HUG'
Can you help me to learn more?
(Other definitions for bear hug that I've seen before include "embrace that's painful?" , "Wrestling hold" , "Rough tight embrace" , "Stifling embrace" , "Huge bra (anag.)" .)