Chopin amused at heart by this work (4)

I believe the answer is:

opus

I'm a little stuck... Click here to teach me more about this clue!

'chopin amused at heart by this work' is the definition.
'opus' can be an answer for 'work' (an opus is an artistic work). I'm not certain of the rest of the definition.

'amused at heart by this work' is the wordplay.
'at heart' says to take the centre.
'by' means one lot of letters go next to another.
'this work' becomes 'op' (short for opus).
The middle of 'amused' is 'us'.
'us' put after 'op' is 'OPUS'.

Can you help me to learn more?

(Other definitions for opus that I've seen before include "Work (of a composer?)" , "Composition - magnum __" , "Work or composition, usually musical" , "Composer's catalogue number" , "Composer's work" .)

I've seen this clue in The Irish Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.