Gush when tofu's cooked and soft (7)
I believe the answer is:
outflow
'gush' is the definition.
(thesaurus)
'tofu's cooked and soft' is the wordplay.
'cooked' indicates anagramming the letters (letters cooked into a new form).
'and' says to put letters next to each other.
'soft' becomes 'low' (similar in meaning).
'tofu' with letters rearranged gives 'outf'.
'outf'+'low'='OUTFLOW'
'when' is the link.
(Other definitions for outflow that I've seen before include "Tofu owl (anag.)" , "Amount of liquid moving away" , "running away" , "Amount flooding away" , "Discharge" .)