Swimming stroke in which the feet are kicked like paddles while the arms reach forward and pull back through the water (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
crawl
(Other definitions for crawl that I've seen before include "fawn" , "Get along swimmingly" , "Suck up to" , "Unusually slow rate of movement" , "This can take you quickly through water" .)