We finish last in the rain (3)
I believe the answer is:
wet
'rain' is the definition.
(I've seen this in other clues)
'we finish last' is the wordplay.
'finish' suggests the final letters.
The last letter of 'last' is 't'.
'we'+'t'='WET'
'in the' is the link.
(Other definitions for wet that I've seen before include "Moisture; feeble (colloq.)" , "Irresolute" , "Soaked with water" , "Moistened" , "Soaked with liquid" .)