Sycophant to move slowly (5)
I believe the answer is:
creep
I believe this clue is a double definition.
'sycophant' is the first definition.
(I've seen this before)
'move slowly' is the second definition.
(I've seen this before)
'to' is the link.
(Other definitions for creep that I've seen before include "Cringing, unpleasant person (slang)" , "Move slowly and stealthily" , "Unpleasant person; develop slowly" , "Move softly and slowly like slangy servile person" , "Crawl silently" .)