In good condition, hollow round circles - like so? (4-6)
I believe the answer is:
ring-shaped
'so?' is the definition.
Both the definition and answer are adjectives. Perhaps there's a link between them I don't understand?
'in good condition hollow round circles' is the wordplay.
'good' becomes 'g' (abbreviation).
'condition' becomes 'shape' (I've seen this in another clue).
'hollow' means to remove the middle letters (the word is hollowed out).
'circles' means one lot of letters goes inside another (some letters go round others).
'round' with its centre removed is 'rd'.
'in'+'g'+'shape'='ingshape'
'ingshape' inserted into 'rd' is 'RING-SHAPED'.
'like' acts as a link.
Can you help me to learn more?