Run playfully (7)
I believe the answer is:
scamper
'run playfully' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for scamper that I've seen before include "Scurry, scuttle" , "Run and skip playfully about" , "Run along quickly" , "Run with quick light steps" , "Skip around" .)