A rich seat maybe (5)

I believe the answer is:

chair

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

'seat maybe' is the definition.
(I know that chair is a type of chair)

'a rich' is the wordplay.
'a rich' anagrams to 'CHAIR'.
Though, I'm unsure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for chair that I've seen before include "director at meeting" , "Supporter" , "Prof's post; meeting leader" , "Item of furniture (which can be addressed!)" , "See 4" .)

I've seen this clue in The Irish Independent.

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