In the rain, we finish last (3)

I believe the answer is:

wet

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

'in the rain' is the definition.
I can't tell whether this definition defines the answer.

'we finish last' is the wordplay.
'finish' suggests the final letters.
The final letter of 'last' is 't'.
'we'+'t'='WET'

Can you help me to learn more?

(Other definitions for wet that I've seen before include "Watery" , "Rainy; feeble person" , "Moistened" , "Moisture; feeble (colloq.)" , "Irresolute" .)

I've seen this clue in the Evening Standard.

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