Disney takes on a British composer (6)
I believe the answer is:
walton
'a british composer' is the definition.
'walton' can be an answer for 'composer' (I've seen this before). I'm unsure of the 'a british' bit.
'disney takes on' is the wordplay.
'disney' becomes 'Walt' (Walt Disney).
'takes' is a charade indicator (letters next to each other).
'walt'+'on'='WALTON'
Can you help me to learn more?
(Other definitions for walton that I've seen before include "English writer, d. 1683 - English composer. d. 1983" , "Sir William -, composer" , "He composed" , "William --, composer (Belshazzar's Feast)" , "William ---, composer; Izaak ---, author" .)