Present from eccentric artist guy shunned by society (8)
I believe the answer is:
gratuity
'present' is the definition.
(thesaurus)
'eccentric artist guy shunned by society' is the wordplay.
'eccentric' indicates an anagram.
'shunned by' is a deletion indicator.
'society' becomes 's' (common abbreviation in names of organisations).
'artist'+'guy'='artistguy'
'artistguy' with 's' taken away is 'artitguy'.
'artitguy' anagrammed gives 'GRATUITY'.
'from' acts as a link.
(Other definitions for gratuity that I've seen before include "Tip (to waiter)" , "present" .)