To a medical person, it means scope (5)

I believe the answer is:

ambit

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'scope' is the definition.
('ambit' can be a synonym of 'scope')

'to a medical person it' is the wordplay.
'medical person' becomes 'mb' (I am not sure about this - if you are sure you should believe this answer much more).
'a'+'mb'+'it'='AMBIT'

'means' is the link.

Can you help me to learn more?

(Other definitions for ambit that I've seen before include "Compass, scope" , "Circuit, compass" , "Circumference" , "Scope or confines" , "Scope, extent, or bounds of something" .)

I've seen this clue in the Evening Standard.

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