Crawl from Krakow to Warsaw (6)
I believe the answer is:
kowtow
'crawl' is the definition.
(thesaurus)
'from krakow to warsaw' is the wordplay.
'from' says the answer is hidden in the clue.
'KOWTOW' can be found hidden inside 'krakow to warsaw'.
(Other definitions for kowtow that I've seen before include "Toady" , "Abase oneself" , "Make a deferential gesture" , "Show servile deference (as in Chinese custom)" , "Be excessively subservient" .)