Devotee smashed icon if a bother (10)
I believe the answer is:
aficionado
'devotee' is the definition.
(I've seen this before)
'smashed icon if a bother' is the wordplay.
'smashed' indicates an anagram.
'bother' becomes 'ado' (both can mean fuss or commotion).
'icon'+'if'+'a'='iconifa'
'iconifa' is an anagram of 'aficion'.
'aficion'+'ado'='AFICIONADO'
(Other definitions for aficionado that I've seen before include "ardent follower" , "Devotee" , "freak" , "Fan (Sp.)" , "supporter" .)