Something put on (to cover a fiddle?) (8)
I believe the answer is:
overcoat
'something put' is the definition.
I can't judge whether this definition defines the answer.
'to cover a fiddle?' is the wordplay.
'fiddle?' indicates an anagram (I've seen 'fiddled' mean this).
'to'+'cover'+'a'='tocovera'
'tocovera' anagrammed gives 'OVERCOAT'.
'on' acts as a link.
Can you help me to learn more?
(Other definitions for overcoat that I've seen before include "Long garment" , "Clobber" , "Heavy outer garment" , "protective layer" , "warmer" .)