Feeble toff somehow led Cornish news (8,6)
I believe the answer is:
chinless wonder
'feeble toff' is the definition.
'somehow led cornish news' is the wordplay.
'somehow' indicates an anagram.
'led'+'cornish'+'news'='ledcornishnews'
'ledcornishnews' with letters rearranged gives 'CHINLESS WONDER'.
(Other definitions for chinless wonder that I've seen before include "Weak character" , "ineffectual toff" , "One ineffectual" , "weak swell" , "unexceptional toff" .)