Short time “visiting” jug? That’s interminable bird! (8)
I believe the answer is:
flamingo
'bird' is the definition.
(flamingo is a kind of bird)
'short time visiting jug? that's interminable' is the wordplay.
'short time' becomes 'min' (abbreviation for minute).
'visiting' indicates putting letters inside.
'jug?' becomes 'flagon' (I have seen 'Large jug ' mean 'flagon' so perhaps 'jug' could also mean 'flagon').
'that's interminable' means to remove the last letter (interminable can mean without end).
'flagon' with its last letter taken away is 'flago'.
'min' placed inside 'flago' is 'FLAMINGO'.
(Other definitions for flamingo that I've seen before include "Tall wading bird" , "Long-legged bird" , "Wading bird with pink and red plumage" , "Pink flier" , "Pretty bird" .)