Check wet weather report (4)
I believe the answer is:
rein
'check' is the definition.
(both can mean to control or limit)
'wet weather report' is the wordplay.
'wet weather' becomes 'rain' (rain is wet weather).
'report' shows a homophone (sound like).
'rain' is a homophone of 'REIN'.
(Other definitions for rein that I've seen before include "Part of tack" , "Hold back" , "A means of control" , "leading article?" , "given free to experienced riders?" .)