Crossword Genius

Give president weapons and somewhere to sit (8)

Ross

I believe the answer is:

armchair

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

'weapons and somewhere to sit' is the definition.
I can't judge whether this definition defines the answer.

'give president' is the wordplay.
'give' becomes 'arm' (I can't explain this - if you can you should believe this answer much more).
'president' becomes 'chair' (synonyms).
'arm'+'chair'='ARMCHAIR'

Can you help me to learn more?

(Other definitions for armchair that I've seen before include "Comfortable seat with raised sides" , "Roomy seat" , "Seat with side supports" , "TV viewer's seat" , "Seat to relax in" .)

I've seen this clue in The Times.
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