Wildly chants a fragment of melody (6)
I believe the answer is:
snatch
'fragment of melody' is the definition.
'snatch' can be an answer for 'fragment' (as in hearing a snatch of a song). I'm not certain of the 'of melody' bit.
'wildly chants a' is the wordplay.
'chants' can be anagrammed to 'SNATCH'.
But, I am not sure how the anagram is indicated.
Can you help me to learn more?
(Other definitions for snatch that I've seen before include "Seize suddenly" , "Piece of music" , "Grab rudely, hastily" , "Bit of a song" , "Forcibly remove" .)