Algeria destroyed symbols of royalty (7)
I believe the answer is:
regalia
'symbols of royalty' is the definition.
'algeria destroyed' is the wordplay.
'destroyed' indicates anagramming the letters.
'algeria' with letters rearranged gives 'REGALIA'.
(Other definitions for regalia that I've seen before include "Orb and sceptre etc" , "Algeria (anag)" , "Royal trappings" , "Royal items" , "Array" .)