Nothing drunk by a poet ready to set sail (6)
I believe the answer is:
aboard
'ready to set sail' is the definition.
'nothing drunk by a poet' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'drunk by' indicates putting letters inside.
'poet' becomes 'bard' (bard is a kind of poet).
'a'+'bard'='abard'
'o' going into 'abard' is 'ABOARD'.
(Other definitions for aboard that I've seen before include "... [CRUISE SHIP] here, perhaps" , "on base" , "ready to take off" , "on a liner, say" , "in a car" .)