We finish last when it's raining (3)

I believe the answer is:

wet

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'it's raining' is the definition.
I can't judge whether this definition defines the answer.

'we finish last' is the wordplay.
'finish' indicates one should take the final letters.
The last letter of 'last' is 't'.
'we'+'t'='WET'

'when' acts as a link.

Can you help me to learn more?

(Other definitions for wet that I've seen before include "Damp" , "Soaked with water" , "Irresolute" , "Saturated; rainy" , "Moistened" .)

I've seen this clue in the Evening Standard.

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