Volume of Whitman contains nothing to kill time (6)
I believe the answer is:
loiter
'kill time' is the definition.
(I've seen this in another clue)
'volume of whitman contains nothing' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is present in the answer.
'volume' could be 'liter' (I have seen 'American volume' mean 'liter' so perhaps 'volume' could also mean 'liter') and 'liter' is found within the leftover letters.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
'to' is the link.
Can you help me to learn more?
(Other definitions for loiter that I've seen before include "Linger - lurk" , "Hang around, lurk" , "Tarry like toiler" , "Hang about idly" , "Hang around furtively" .)