Four brave nurses go out for a good time (9)
I believe the answer is:
gallivant
'out for a good time' is the definition.
I can't judge whether this definition defines the answer.
'four brave nurses' is the wordplay.
'four' becomes 'IV' (Roman numerals for four).
'brave' becomes 'gallant' (similar in meaning).
'nurses' indicates putting letters inside (nurse can mean to hold onto or harbour).
'iv' put inside 'gallant' is 'GALLIVANT'.
'go' is the link.
Can you help me to learn more?
(Other definitions for gallivant that I've seen before include "play around" , "Gad about, seeking pleasure" , "go in search of pleasure" , "Flit about" , "Wander aimlessly" .)