Light-haired (4)
'light-haired' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for fair that I've seen before include "(Of skin) pale" , "Having light-coloured hair and skin" , "'Just, reasonable (4)'" , "Equitable - market - not bad" , "Unbiased; carnival" .)
'light-haired' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for blonde that I've seen before include "Light-haired woman" , "Of a woman, having fair hair (6)" , "Kind of girl that gentlemen are said to prefer" , "Pale-haired" , "Person with fair hair" .)