Winter athlete bags score that's not so perfect (9)
I believe the answer is:
sketchier
'that's not so perfect' is the definition.
I can't judge whether this definition defines the answer.
'winter athlete bags score' is the wordplay.
'winter athlete' becomes 'skier' (skier is a kind of athlete. I am not sure about the 'winter' bit.).
'bags' indicates putting letters inside (bag can mean secures or steals).
'score' becomes 'etch' (etch can mean to score or carve into something).
'skier' enclosing 'etch' is 'SKETCHIER'.
Can you help me to learn more?
(Other definitions for sketchier that I've seen before include "Less clearly drawn" , "Vaguer in outline - stick here (anag)" .)