Reasonable chair (8)

I believe the answer is:

moderate

I believe this clue is a double definition.

'reasonable' is the first definition.
(I've seen this before)

'chair' is the second definition.
('moderate' can be a synonym of 'chair')

(Other definitions for moderate that I've seen before include "Not excessively right- or left-wing" , "Make less severe" , "Within reasonable or average limits" , "So-so; sensible" , "Make reasonable" .)

I've seen this clue in The Telegraph.

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