Very simple task comedian will read out (6)
I believe the answer is:
'very simple task' is the definition.
(if something is a doddle it is very easy or simple)
'comedian will read out' is the wordplay.
'comedian will' becomes 'Dodd'll' (ie 'Dodd will' - Ken Dodd was a comedian).
'read out' indicates a 'sounds like' (homophone) clue.
'doddll' sounds like 'DODDLE'.
(Other definitions for doddle that I've seen before include "Easy task (informal)", "Absurdly simple", "pushover", "Piece of cake", "Snip".)