More showery (7)
I believe the answer is:
rainier
'more showery' is the definition.
('rainy' can be a synonym of 'showery')
This is the entire clue.
(Other definitions for rainier that I've seen before include "more drops?" , "weather getting worse" , "Prince . . . . . . . rules Monaco" , "Mountain" , "Prince of Monaco, married to Grace Kelly, d. 2005" .)