Again, certain figures are a reminder (5)

I believe the answer is:

relic

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'a reminder' is the definition.
(thesaurus)

'again certain figures' is the wordplay.
'again' becomes 're' (prefix meaning 'again').
'certain figures' becomes 'lic' (I am not sure about this - if you are sure you should believe this answer much more).
're'+'lic'='RELIC'

'are' acts as a link.

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(Other definitions for relic that I've seen before include "Outdated survival" , "Ancient artefact" , "Object of historic interest" , "Old memento" , "Saint's body part?" .)

I've seen this clue in the Evening Standard.

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