Goddess in heaven, usually (5)
I believe the answer is:
venus
'goddess' is the definition.
(Roman goddess of love)
'in heaven usually' is the wordplay.
'in' indicates a hidden word.
'VENUS' is hidden within 'heaven usually'.
(Other definitions for venus that I've seen before include "Heavenly body" , "The embodiment of Love" , "our Neighbour" , "Roman goddess of love" , "Next planet in" .)