Affected rep treated and nursed (9)
I believe the answer is:
pretended
'affected' is the definition.
('pretend' can be a synonym of 'affect')
'rep treated and nursed' is the wordplay.
'treated' indicates anagramming the letters.
'and' says to put letters next to each other.
'nursed' becomes 'tended' (I've seen this before).
'rep' is an anagram of 'pre'.
'pre'+'tended'='PRETENDED'
(Other definitions for pretended that I've seen before include "Feigned, faked" , "Made believe with intent to deceive" , "Feigned, affected" , "Engaged in fantasy; simulated (an emotion)" , "Made believe, feigned," .)