Meat in spoon finally wiped to be cleaner (7)
I believe the answer is:
shampoo
'be cleaner' is the definition.
(shampoo cleans hair)
'meat in spoon finally wiped' is the wordplay.
'meat' becomes 'ham' (ham is a kind of meat).
'in' is an insertion indicator.
'finally wiped' means to remove the last letter.
'spoon' with its final letter removed is 'spoo'.
'ham' inserted into 'spoo' is 'SHAMPOO'.
'to' acts as a link.
(Other definitions for shampoo that I've seen before include "Washer for locks" , "Ooh, spam! (anag.)" , "treat shock?" , "Liquid that goes to your head?" , "cleansing operation" .)