It's seen in heaven, usually (5)
I believe the answer is:
venus
'it's' is the definition.
I can't tell whether this defines the answer.
'in heaven usually' is the wordplay.
'in' indicates a hidden word.
'VENUS' is hidden in the letters of 'heaven usually'.
'seen' is the link.
Can you help me to learn more?
(Other definitions for venus that I've seen before include "Next planet in" , "not really a star" , "Second nearest planet to the sun" , "Heavenly body" , "One of the planets" .)