Skinflint in unconscious state, turned into sympathy (13)
I believe the answer is:
commiseration
'sympathy' is the definition.
(I know that commiseration is a type of sympathy)
'skinflint in unconscious state turned into' is the wordplay.
'skinflint' becomes 'miser' (synonyms).
'in' means one lot of letters goes inside another.
'unconscious state' becomes 'coma' (I've seen this before).
'turned' indicates anagramming the letters.
'into' with letters rearranged gives 'tion'.
'coma'+'tion'='comation'
'miser' put into 'comation' is 'COMMISERATION'.
(Other definitions for commiseration that I've seen before include "Sympathy" , "fellow feeling" , "pity" .)