Rubicund (5)
I believe the answer is:
ruddy
'rubicund' is the definition.
(I know that rubicund can be written as ruddy)
This is the entire clue.
(Other definitions for ruddy that I've seen before include "Rubicund" , "Damned - healthy" , "Healthily red in face" , "Damn" , "Reddish; -- duck" .)