Cool guy has to accept workplace injury, getting emotional relief (9)
I believe the answer is:
catharsis
'emotional relief' is the definition.
(I've seen this before)
'cool guy has to accept workplace injury' is the wordplay.
'cool guy' becomes 'cat' (slang term for a cool guy).
'to accept' means one lot of letters goes inside another.
'workplace injury' becomes 'RSI' (repetitive strain injury).
'has' going around 'rsi' is 'harsis'.
'cat'+'harsis'='CATHARSIS'
'getting' is the link.
(Other definitions for catharsis that I've seen before include "relief of tensions" , "Emotional purge" , "The release of pent-up emotions" , "Purification - is rash act (anag)" , "emotional relief" .)