Bird returned at start of October with a lively manner (7)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

MINA (any of various related sturnoid Asiatic birds of which the species Gracula religiosa, black with white spots on the wings, can be taught to imitate human speech; alternative spelling of MYNA ) reversed (returned) + AT + O ( first letter of [start of] O ctober)