Wet home bathed in bit of sunshine (5)
I believe the answer is:
rainy
'wet' is the definition.
(similar in meaning)
'home bathed in bit of sunshine' is the wordplay.
'home' becomes 'in' ('he's home' can mean 'he's in').
'bathed in' means one lot of letters goes inside another (I've seen this in other clues).
'bit of sunshine' becomes 'ray' (a ray of light).
'in' placed within 'ray' is 'RAINY'.
(Other definitions for rainy that I've seen before include "With water falling outside" , "Save your money for a . . . . . day - to buy an umbrella?" , "Pluvial" , "(Of weather) wet" , "The day one saves for" .)