Waver when ridiculous excursion involves two hours separated (6-6)
I believe the answer is:
shilly-shally
'waver' is the definition.
(thesaurus)
'ridiculous excursion involves two hours separated' is the wordplay.
I cannot quite see how this works, but
'hours' could be 'h' and 'h' is found within the answer.
'ridiculous' could be 'silly' (synonyms) and 'silly' is present in the leftover letters.
This may be the basis of the clue (or it may be nonsense).
'when' acts as a link.
Can you help me to learn more?
(Other definitions for shilly-shally that I've seen before include "Be indecisive" , "Hesitate" , "Vacillate" , "Procrastinate" , "Dither" .)