Walk cautiously (6)
I believe the answer is:
tiptoe
'walk cautiously' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tiptoe that I've seen before include "Go gently" , "Creep" , "Lightly pad" , "Walk very lightly - musically through the tulips" , "Move delicately" .)