Biased against fine amusement park (7)
I believe the answer is:
funfair
'amusement park' is the definition.
('funfair' can be a synonym of 'amusement park')
'biased against fine' is the wordplay.
'biased' becomes 'unfair' ('unfair' can be similar in meaning to 'biased').
'against' says to put letters next to each other.
'fine' becomes 'f' (abbreviation).
'unfair' after 'f' is 'FUNFAIR'.
(Other definitions for funfair that I've seen before include "place of amusement" , "entertainment for the family?" , "Swings and roundabouts" , "Amusements here" , "Amusement park" .)