Nonsense writer engaging husband as composer of music (5)
I believe the answer is:
lehar
'composer of music' is the definition.
'Lehar' can be an answer for 'composer' (Austro-Hungarian composer Franz Lehar). I'm not sure about the 'of music' bit.
'nonsense writer engaging husband' is the wordplay.
'nonsense writer' becomes 'lear' (I have seen 'comic writer' mean 'lear' so perhaps 'writer' could also mean 'lear'. I am not sure about the 'nonsense' bit.).
'engaging' means one lot of letters goes inside another (inserted letters are engaged or involved in others).
'husband' becomes 'h' (abbreviation).
'lear' enclosing 'h' is 'LEHAR'.
'as' is the link.
Can you help me to learn more?
(Other definitions for lehar that I've seen before include "Viennese composer" , "Franz . . . . . composed 'The Merry Widow'" , "Hungarian composer of operettas" , "Franz -----, composer of The Merry Widow" , "He scored" .)