Turn out policies with singular appeal (10)
I believe the answer is:
comeliness
'appeal' is the definition.
(both can mean being attractive)
'turn out policies with singular' is the wordplay.
'turn out' becomes 'come' (both can mean to attend something).
'policies' becomes 'lines' (as in a party line, a political policy or view).
'with' means one lot of letters go next to another.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'come'+'lines'+'s'='COMELINESS'
(Other definitions for comeliness that I've seen before include "good looks?" , "Beauty" .)