Crossword Genius

He can't be a keeper! (5)

Ross

I believe the answer is:

giver

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

'a keeper' is the definition.
The answer and definition can be both people as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'he can't' is the wordplay.
I cannot quite understand how this works, but
'he' could be 'iver' and 'iver' is located in the answer.
A single letter 'g' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

'be' acts as a link.

Can you help me to learn more?

(Other definitions for giver that I've seen before include "Present source" , "Bestower" , "Donor" , "presenter" .)

I've seen this clue in the Evening Standard.
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