Cosmetic combination of sauce and jam? (8)
I believe the answer is:
lipstick
'cosmetic' is the definition.
(I know that lipstick is a type of make-up)
'sauce and jam?' is the wordplay.
'sauce' becomes 'lip' (both can mean insolence).
'and' means one lot of letters go next to another.
'jam?' becomes 'stick' (jam can mean to get stuck).
'lip'+'stick'='LIPSTICK'
'combination of' is the link.
This may not be correct. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for lipstick that I've seen before include "girl may have to face" , "Type of paint" , "Item of face makeup" , "Type of cosmetic" , "Item of make-up equipment" .)