Planet's in heaven, usually (5)
I believe the answer is:
venus
'planet's' is the definition.
(Venus is an example)
'in heaven usually' is the wordplay.
'in' indicates the answer is hidden within the clue.
'VENUS' is hidden within 'heaven usually'.
(Other definitions for venus that I've seen before include "Heavenly body" , "Aggrieved, peeved" , "Evening star" , "not really a star" , "One of the planets" .)