Turns, beginning to show legs (5)
I believe the answer is:
spins
'turns' is the definition.
(spin is a kind of turn)
'beginning to show legs' is the wordplay.
'beginning to' indicates taking the first letters.
'legs' becomes 'pins' (pin is a kind of leg).
The first letter of 'show' is 's'.
's'+'pins'='SPINS'
(Other definitions for spins that I've seen before include "Revolves" , "Gyrates" .)