Corn seen waving, displayed by monitor (8)

I believe the answer is:

onscreen

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

'monitor' is the definition.
I know nothing about this answer so I can't judge whether this works.

'corn seen waving' is the wordplay.
'waving' indicates anagramming the letters (letters wave around).
'corn'+'seen'='cornseen'
'cornseen' anagrammed gives 'ONSCREEN'.

'displayed by' acts as a link.

Can you help me to learn more?

(Other definitions for onscreen that I've seen before include "As displayed by TV or computer" , "Shown in film or TV programme" , "As visible on the TV" .)

I've seen this clue in The Times.

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