Understand, as a follower? (3)

I believe the answer is:

get

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'understand' is the definition.
(I know that understand can be written as get)

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for get that I've seen before include "Procure or secure" , "See 18" , "Fetch or obtain" , "Receive; obtain" , "Procure from vegetables" .)

I've seen this clue in the Evening Standard.

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