Time to return poor group (5)
I believe the answer is:
troop
'group' is the definition.
The answer is an example.
'time to return poor' is the wordplay.
'time' becomes 't' (abbreviation).
'to return' shows that the letters should be reversed in order.
'poor' backwards is 'roop'.
't'+'roop'='TROOP'
(Other definitions for troop that I've seen before include "Flock, crowd" , "Proto (anag.)" , "Flock; Scout group" , "A company of people, soldiers or scouts" , "Force" .)