We go to central Acton in the rain (3)
I believe the answer is:
wet
'rain' is the definition.
(I've seen this in other clues)
'we go to central acton' is the wordplay.
'go to' says to put letters next to each other.
'central' indicates the central letters.
The central letter of 'acton' is 't'.
'we'+'t'='WET'
'in the' acts as a link.
(Other definitions for wet that I've seen before include "Watery" , "Moist or Soaked" , "Damp" , "Moderately Conservative" , "Rainy; feeble person" .)