Answer:

harks

Answer	Crossword Clue
HARKS	Becomes alert, say
HARKS	Pays attention
HARKS	Pays attention, old style

HARKS	Refers (back), as to a prior subject
HARKS	Lends an ear
HARKS	Listens carefully: Poet.
HARKS	... back (reverts).
HARKS	Listens to, old style.
HARKS	Listens
HARKS	Gives ear
HARKS	Listens, old-style

HARKS	Listens to Shakespeare?
HARKS	Listens attentively
HARKS	Pays attention, old-style