Moving free, not it is said, from this? (4,4)
I believe the answer is:
reef knot
'this?' is the definition.
The definition suggests a singular noun which matches the answer.
'moving free not it is said' is the wordplay.
'moving' indicates an anagram.
'it is said' indicates a 'sounds like' (homophone) clue.
'not' sounds like 'knot'.
'free' is an anagram of 'reef'.
'reef'+'knot'='REEF-KNOT'
'from' is the link.
Can you help me to learn more?
(Other definitions for reef knot that I've seen before include "Way of securing a rope" , "Sailor's bond" , "Token ref? (anag)" , "Secure tie" , "Simple way to secure two rope ends" .)