A range or other (9)

I believe the answer is:

apennines

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'or other' is the definition.
I can't judge whether this definition defines the answer.

'a range' is the wordplay.
'range' becomes 'Pennines' (mountain range).
'a'+'pennines'='APENNINES'

Can you help me to learn more?

(Other definitions for apennines that I've seen before include "Italian mountain range" , "Italian mountain chain" , "Great mountain range in Italy (9)" , "Mountain range in central Italy" , "Italian mountains" .)

I've seen this clue in The Daily Express.

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