Less refined mat has nothing on that woman (7)
I believe the answer is:
rougher
'less refined' is the definition.
The answer and definition are not the same part of speech.
'mat has nothing on that woman' is the wordplay.
'mat' becomes 'rug' (floor covering).
'has' means one lot of letters goes inside another.
'nothing on' becomes 'o' (I've seen this in other clues).
'that woman' becomes 'her' ('her' refers to a woman).
'rug' enclosing 'o' is 'roug'.
'roug'+'her'='ROUGHER'
Can you help me to learn more?
(Other definitions for rougher that I've seen before include "less well?" , "Less smooth" , "Not so gentle" .)