Reminder of past dereliction? (5)

I believe the answer is:

relic

'reminder' is the definition.
(thesaurus)

'of past dereliction?' is the wordplay.
'of' says the answer is hidden in the clue.
'RELIC' can be found hidden inside 'past dereliction'.

(Other definitions for relic that I've seen before include "Ancient artefact" , "Bit of a saint, perhaps" , "Venerated memento" , "Object of historic interest" , "Item surviving from the past" .)

I've seen this clue in the Evening Standard.

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