Brave comedian, overly detailed (5,2,2)
I believe the answer is:
stand up to
'brave' is the definition.
(I've seen this before)
'comedian overly detailed' is the wordplay.
'comedian' becomes 'standup' (standup comedian is a kind of comedian).
'overly' becomes 'too' (to too great a degree).
'detailed' means to remove the last letter (the word must be end-less or 'de-tailed').
'too' with its last letter removed is 'to'.
'standup'+'to'='STAND UP TO'
(Other definitions for stand up to that I've seen before include "Resist (someone)" , "Brave" , "Resist person courageously - get off your knees" .)