Long-lasting (7)

I believe the answer is:

durable

I believe this is a double definition.

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

'lasting' is the second definition.
(I know that lasting can be written as durable)

(Other definitions for durable that I've seen before include "Rugged; long-lasting" , "Firm" , "Likely to last" , "Hardy" , "Good" .)

I've seen this clue in The Independent, The Telegraph, the Evening Standard, the Universal and The Mirror.

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