Affected (8)
(Other definitions for arty that I've seen before include "Affectedly cultural" , "Pretentiously affected" , "aesthetic pretensions" , "Affectedly unconventional" , "Making a point of appearing interested in painting, sculpture etc" .)
'affected' is the definition.
(camp can mean exaggerated or affected)
This is all the clue.
(Other definitions for camp that I've seen before include "Distance down" , "Limp-wristed in tent?" , "doctrinaire group" , "Exaggerated in style for humorous effect - in tent?" , "Temporary living quarters, for soldiers perhaps" .)
'affected' is the definition.
(thesaurus)
This is all the clue.
'affected' is the definition.
('impact' can be a synonym of 'affect')
This is the entire clue.
(Other definitions for impacted that I've seen before include "Crushed" , "Had an effect upon" , "had influence" , "Wedged firmly" , "Wisdom teeth may be so stuck" .)
'affected' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for mannered that I've seen before include "Affected, stilted" , "Idiosyncratic" , "Acting with exaggerated behaviour" , "Artificial, stilted" , "Artificial, pretentious" .)