Footwear sticks on top of scraper (7)
I believe the answer is:
gumshoe
'footwear' is the definition.
(I know that gumshoe is a type of overshoe)
'sticks on top of scraper' is the wordplay.
'sticks' becomes 'gums'.
'on top of' says to put letters next to each other.
'scraper' becomes 'hoe' (gardening tool used for scraping).
'gums'+'hoe'='GUMSHOE'
(Other definitions for gumshoe that I've seen before include "Dick" , "Galosh - sleuth" , "Foreign investigator" , "Possible US version of Morse" , "US detective (informal)" .)