Waddle half back, and don't hurry (6)
I believe the answer is:
dawdle
'don't hurry' is the definition.
(to dawdle is to act or move slowly)
'waddle half back' is the wordplay.
'waddle' can be anagrammed to 'DAWDLE'.
Though, I am unsure how this is indicated.
'and' acts as a link.
(Other definitions for dawdle that I've seen before include "Lag behind" , "Linger on aimlessly" , "Loiter" , "Act slowly" , "Dilly-dally" .)