Like article by coach in knitted top (8)
I believe the answer is:
cardigan
'knitted top' is the definition.
(type of knitted garment)
'like article by coach in' is the wordplay.
'like' becomes 'dig' (I've seen this in another clue).
'article' becomes 'an' (indefinite article).
'by' says to put letters next to each other.
'coach in' becomes 'car' (as in a train coach or car. I am not sure about the 'in' bit.).
'dig'+'an'='digan'
'digan' after 'car' is 'CARDIGAN'.
(Other definitions for cardigan that I've seen before include "Knitted jacket" , "Warmer" , "town in Wales" , "Knitted jumper with buttons" , "Arcading in woolly garment" .)