Rational, reasonable (7)

I believe the answer is:

logical

I believe this clue is a double definition.

'rational' is the first definition.
(similar in meaning)

'reasonable' is the second definition.
(associated in meaning)

(Other definitions for logical that I've seen before include "Showing rational thought" , "entirely reasonable" , "In accordance with reason" , "According with reason" , "Well thought out" .)

I've seen this clue in The Sun.

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