Come round after Hogmanay? Fellow in binge in US goes behind trees (9)

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

Come round after Hogmanay? Fellow in binge in US goes behind trees FIRS (=trees) + [F (=fellow) in TOOT (= (drinking) binge, in US)]; to first-foot is to be the first person to visit a house after the beginning of the new year, hence “come round after Hogmanay”