Fashionable and fit for a warm spring? (3,4)

I believe the answer is:

hot well

I'm a little stuck... Click here to teach me more about this clue!

'a warm spring?' is the definition.
The definition suggests a singular noun which matches the answer.

'fashionable and fit' is the wordplay.
'fashionable' becomes 'hot' (I've seen this in another clue).
'and' is a charade indicator (letters next to each other).
'fit' becomes 'well' (associated in meaning).
'hot'+'well'='HOT WELL'

'for' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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