Be effusive in escorting us home (4)
I believe the answer is:
gush
'be effusive' is the definition.
(I've seen this in another clue)
'in escorting us home' is the wordplay.
'in' indicates a hidden word.
'GUSH' is hidden within 'escorting us home'.
(Other definitions for gush that I've seen before include "Be over-effusive" , "Spout powerfully" , "Effuse" , "Sudden stream or jet" , "Spout like oil-well" .)