A healthy look is fun not pain (some of the time) (6)

'a healthy look' is the definition.
The answer and definition can be both states of affairs as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'fun not pain some of the time' is the wordplay.
I cannot quite see how this works, but
'not' could be 'nt' (synonyms) and 'nt' is located in the answer.
'some' could be 'a' and 'a' is present in the answer.
The remaining letters 'sun' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

'is' acts as a link.

Can you help me to learn more?