Planet with a hole in the middle (7)
I believe the answer is:
jupiter
'planet' is the definition.
(Jupiter is an example)
'hole in the middle' is the wordplay.
I cannot really understand how this works, but
'hole' could be 'pit' (a pit is a large hole) and 'pit' is found within the answer.
This explanation may well be incorrect...
'with a' acts as a link.
Can you help me to learn more?
(Other definitions for jupiter that I've seen before include "celestial body" , "Heavenly body" , "Large planet" , "Fifth planet from sun" , "Chief of the Gods, by Jove" .)