Beef tin collapses profit (7)
I believe the answer is:
benefit
'profit' is the definition.
(I know that profit can be written as benefit)
'beef tin collapses' is the wordplay.
'collapses' indicates anagramming the letters.
'beef'+'tin'='beeftin'
'beeftin' anagrammed gives 'BENEFIT'.
(Other definitions for benefit that I've seen before include "Fine bet on to produce an advantage" , "Financial assistance" , "Payment" , "allowance" , "Fringe - -" .)