It's not fair! (5)
I believe the answer is:
rainy
'it's not fair' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for rainy that I've seen before include "(Of weather) wet" , "Save your money for a . . . . . day - to buy an umbrella?" , "Wet, showery" , "With water falling outside" , "The day one saves for" .)