Dogs, maybe, in passageway having no lead (4)
I believe the answer is:
isle
'dogs maybe' is the definition.
(Isle of Dogs)
'passageway having no lead' is the wordplay.
'passageway' becomes 'aisle' (aisle is a kind of passageway).
'having no lead' means to remove the first letter (the letter which leads the word is removed).
'aisle' with its initial letter taken off is 'ISLE'.
'in' is the link.
(Other definitions for isle that I've seen before include "Man's one" , "A poetic island" , "Perspire" , "Ireland, perhaps" , "See 11 Across" .)