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 am not sure about the 'of melody' bit.
'wildly chants a' is the wordplay.
'chants' anagrams to 'SNATCH'.
But, I'm unsure 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" .)