Mellower heavy metal tracks? (6)
I believe the answer is:
feline
'mellower heavy' is the definition.
Although both the answer and definition are adjectives, I can't understand how one could define the other.
'metal tracks?' is the wordplay.
'metal' becomes 'Fe' (Fe is an example).
'tracks?' becomes 'line' (I am not sure about this - if you are sure you should believe this answer much more).
'fe'+'line'='FELINE'
Can you help me to learn more?
(Other definitions for feline that I've seen before include "Of or like cats" , "Persian for one" , "16 [TOM] perhaps" , "Cat-like" , "Pertaining to cats" .)