Unexpectantly find a circular object above (8)

I believe the answer is:

discover

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

'unexpectantly' is the definition.
I can't judge whether this defines the answer.

'a circular object above' is the wordplay.
'a circular object' becomes 'disc' (I've seen this before).
'above' becomes 'over' (I've seen this before).
'disc'+'over'='DISCOVER'

'find' acts as a link.

Can you help me to learn more?

(Other definitions for discover that I've seen before include "Detect, find" , "Find unexpectedly" , "Find out about divorces" , "Be the first to find or see" , "Ascertain, unearth" .)

I've seen this clue in the Sydney Morning Herald.

Want a hint initially instead of a full solution? Install my app