Algeria changed royal insignia (7)

I believe the answer is:

regalia

'royal insignia' is the definition.
(I've seen this before)

'algeria changed' is the wordplay.
'changed' indicates an anagram.
'algeria' with letters rearranged gives 'REGALIA'.

(Other definitions for regalia that I've seen before include "Royal trappings" , "Crown and associated pieces" , "Trappings of royalty" , "Ceremonial robes" , "Royal accoutrements" .)

I've seen this clue in The Sun.

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