Finish first attempt in icy conditions (6)

I believe the answer is:

wintry

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'finish first attempt in icy conditions' is the definition.
I can't judge whether this definition defines the answer.

'finish first attempt' is the wordplay.
'finish first' becomes 'win' (I've seen this in another clue).
'attempt' becomes 'try' (synonyms).
'win'+'try'='WINTRY'

Can you help me to learn more?

(Other definitions for wintry that I've seen before include "Icy, frosty" , "(Of weather) cheerless" , "Seasonally cold" , "characteristic of one season" , "Unfriendly" .)

I've seen this clue in The Globe and Mail.

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