Sutler, maybe, base adherent (4-8)

I believe the answer is:

camp-follower

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'sutler' is the definition.
The definition and answer can be both people as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

'base adherent' is the wordplay.
'base' becomes 'camp' (I can't justify this - if you can you should believe this answer much more).
'adherent' becomes 'follower' (I've seen this before).
'camp'+'follower'='CAMP-FOLLOWER'

'maybe' is the link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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