Rough quality still maintained by country club head (10)
I believe the answer is:
unevenness
'rough quality' is the definition.
'unevenness' can be an answer for 'quality' (unevenness is a kind of quality). I am unsure of the 'rough' bit.
'still maintained by country club head' is the wordplay.
'still' becomes 'even' (synonyms).
'maintained by' is an insertion indicator (maintain can mean to keep hold of).
'country club' becomes 'UN' (United Nations, group of countries).
'head' becomes 'ness' (ness is a headland).
'un'+'ness'='unness'
'even' going within 'unness' is 'UNEVENNESS'.
Can you help me to learn more?
(Another definition for unevenness that I've seen is " Lack of smoothness".)