Ignoring commercial, radio ham spins a yarn (6)
I believe the answer is:
mohair
'a yarn' is the definition.
(I've seen this before)
'ignoring commercial radio ham spins' is the wordplay.
'ignoring' indicates named letters should be taken away.
'commercial' becomes 'ad'.
'spins' indicates an anagram.
'radio'+'ham'='radioham'
'radioham' with 'ad' taken out is 'rioham'.
'rioham' is an anagram of 'MOHAIR'.
(Other definitions for mohair that I've seen before include "Fine hair fabric" , "Fabric made from Angora goat wool" , "coat required" , "Cloth made from wool of angora goat" , "Fabric from coating of angora goat" .)