Hungarian composer Franz L_. What? No not he, another (5)
I believe the answer is:
lehar
'hungarian composer franz' is the definition.
(I've seen this in another clue)
'l what? no not he another' is the wordplay.
I cannot really understand how this works, but
'l' is found in the answer.
'what?' could be 'eh' (sound used to ask 'what?' or 'pardon?') and 'eh' is present in the answer.
'another' could be 'r' (I've seen this in other clues) and 'r' is present in the answer.
A single letter 'a' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for lehar that I've seen before include "Franz . . . . . composed 'The Merry Widow'" , "Operetta composer" , "Hungarian who composed" , "Musician" , "Viennese composer" .)