Just exhibition (4)
I believe the answer is:
fair
I believe this clue is a double definition.
'just' is the first definition.
(associated in meaning)
'exhibition' is the second definition.
(fair is a kind of exhibition)
(Other definitions for fair that I've seen before include "Just; passable" , "Unbiased; carnival" , "Reasonable; pretty" , "Just right" , "Where the helter-skelter may be" .)