Tease family member after short time (5)
I believe the answer is:
taunt
'tease' is the definition.
(I know that tease can be written as taunt)
'family member after short time' is the wordplay.
'family member' becomes 'aunt' (sister of a parent).
'after' is a charade indicator (letters next to each other).
'short time' becomes 't' (abbreviation for time).
'aunt' after 't' is 'TAUNT'.
(Other definitions for taunt that I've seen before include "Sarcastic challenge" , "Goad, provoke" , "Mock, jeer" , "Tease hurtfully" , "Thing said to anger or wound" .)