Fish head removed by daughter during party? That's bold stuff (7-2)
I believe the answer is:
derring-do
'bold stuff' is the definition.
(derring-do is boldness or bravery)
'fish head removed by daughter during party?' is the wordplay.
I cannot really understand how this works, but
'daughter' could be 'd' (genealogical abbreviation) and 'd' is located in the answer.
'during' could be 'in' (e.g. during February means in February) and 'in' is found in the answer.
'party?' could be 'do' (do is a kind of party) and 'do' is found in the answer.
This explanation may well be incorrect...
'that's' acts as a link.
(Other definitions for derring-do that I've seen before include "Literary expression for heroic courage or action" , "Literary word for heroic courage or action" , "Brave and heroic feat(s)" , "Courageous action" , "heroic deeds" .)