Symbol of love, in Heaven usually (5)
I believe the answer is:
venus
'symbol of love' is the definition.
(Venus was the Roman goddess of love)
'in heaven usually' is the wordplay.
'in' indicates a hidden word.
'VENUS' can be found hidden inside 'heaven usually'.
(Other definitions for venus that I've seen before include "not really a star" , "Second nearest planet to the sun" , "Heavenly body" , "Roman goddess of love" , "our Neighbour" .)