He gives you the signal, but you hesitate (5)
I believe the answer is:
waver
'hesitate' is the definition.
('waver' can be a synonym of 'hesitate')
'he gives you the signal but you' is the wordplay.
I cannot quite see how this works, but
'he' could be 'ave' and 'ave' is located in the answer.
This may be the basis of clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for waver that I've seen before include "Be uncertain about decision" , "Hesitate" , "One making signal" , "Show hesitation, begin to give way" , "Not be sure of" .)