Hear end of rhapsody, easy to remember (6)
I believe the answer is:
catchy
'easy to remember' is the definition.
(I've seen this before)
'hear end of rhapsody' is the wordplay.
'hear' becomes 'catch' (catching is a kind of hearing).
'end of' suggests the final letters.
The last letter of 'rhapsody' is 'y'.
'catch'+'y'='CATCHY'
(Other definitions for catchy that I've seen before include "(Of a tune) instantly appealing and memorable" , "Readily caught, like a tune" , "Attention-grabbing" , "Of a tune, lively and easy to remember" , "Notedly attractive" .)