After morning, second hand was entertained (6)
I believe the answer is:
amused
'entertained' is the definition.
(amusing is a kind of entertaining)
'after morning second hand' is the wordplay.
'after' means one lot of letters go next to another.
'morning' becomes 'am' (as in 12:00 AM).
'second hand' becomes 'used' (second hand can mean previously owned or used).
'am' next to 'used' is 'AMUSED'.
'was' acts as a link.
(Other definitions for amused that I've seen before include "Beguiled" , "Queen Victoria wasn't!" , "Tickled pink" , "Mildly entertained by Medusa" , "Delighted" .)