Respectable blonde just fine (4)
I believe the answer is:
fair
I believe this is a quadruple definition!!
'respectable' is the first definition.
('fair' can be similar in meaning to 'respectable')
'blonde' is the second definition.
('fair' can be similar in meaning to 'blonde')
'just' is the third definition.
('fair' is associated in meaning with 'just')
'fine' is the fourth definition.
(I've seen this before)
(Other definitions for fair that I've seen before include "Beautiful; exhibition" , "... enough! - that's reasonable" , "Impartial, so-so" , "Market for the sale of produce" , "Reasonable - market" .)