Check remainder prior to wet weather (8)
I believe the answer is:
restrain
'check' is the definition.
(restraining is a kind of checking)
'remainder prior to wet weather' is the wordplay.
'remainder' becomes 'rest' ('rest' can be a synonym of 'remainder').
'prior to' means one lot of letters go next to another.
'wet weather' becomes 'rain' (I've seen this before).
'rest'+'rain'='RESTRAIN'
(Other definitions for restrain that I've seen before include "Stop" , "Keep back" , "In arrest (anagram)" , "Hold back, tether" , "Manacle" .)