Fetching to gain any amount (7)

I believe the answer is:

winsome

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

'fetching' is the definition.
(I've seen this before)

'gain any amount' is the wordplay.
'gain' becomes 'win' (synonyms).
'any amount' becomes 'some' (I am not sure about the 'any' bit.).
'win'+'some'='WINSOME'

'to' acts as a link.

Can you help me to learn more?

(Other definitions for winsome that I've seen before include "Appealingy attractive" , "Attractive and fresh" , "Fetching" , "Attractive, engaging" , "Charming - sweet" .)

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

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