Crossword Genius

Should one inspire or entertain? (5)

Ross

I believe the answer is:

amuse

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

'entertain?' is the definition.
(amuse can mean to entertain or divert)

'should one inspire' is the wordplay.
I cannot quite understand how this works, but
'one' could be 'a' (a thing is one thing) and 'a' is found within the answer.
The remaining letters 'muse' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...

'or' is the link.

Can you help me to learn more?

(Other definitions for amuse that I've seen before include "Divert or entertain mildly" , "interest" , "Pleasantly occupy" , "Tickle" , "Recreate" .)

I've seen this clue in The Irish Times.
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