Girl having paddle round saw manor demolished (9)
I believe the answer is:
oarswoman
'girl having paddle' is the definition.
(I've seen this before)
'round saw manor demolished' is the wordplay.
'round' becomes 'o' (round can mean a round object).
'demolished' indicates an anagram.
'saw'+'manor'='sawmanor'
'sawmanor' anagrammed gives 'arswoman'.
'o'+'arswoman'='OARSWOMAN'
(Other definitions for oarswoman that I've seen before include "River user" , "Girl having paddle" , "Rower" .)