Like image showing pork pie ingredient (5)
I believe the answer is:
aspic
'pork pie ingredient' is the definition.
(jelly used in some meat products)
'like image' is the wordplay.
'like' becomes 'as'.
'image' becomes 'pic' (I've seen this before).
'as'+'pic'='ASPIC'
'showing' acts as a link.
(Other definitions for aspic that I've seen before include "Savoury relish" , "Edible jelly" , "Ending of Marlowe's thriller" , "Savoury jelly used to coat eggs etc" , "Savoury jelly for coating meat, eggs etc" .)