Child tucking into Lancashire dish, child making a mess (10)
I believe the answer is:
hotchpotch
'a mess' is the definition.
(thesaurus)
'child tucking into lancashire dish child' is the wordplay.
'child' becomes 'ch'.
'tucking into' means one lot of letters goes inside another.
'lancashire dish' becomes 'hotpot' (I've seen this before).
'child' becomes 'ch'.
'ch' going within 'hotpot' is 'hotchpot'.
'hotchpot'+'ch'='HOTCHPOTCH'
'making' acts as a link.
(Other definitions for hotchpotch that I've seen before include "confusion" , "jumble" , "Confused medley" , "Mutton stew" , "Confused mixture" .)