Insignia of Algeria destroyed (7)
I believe the answer is:
regalia
'insignia' is the definition.
(regalia are ceremonial symbols or insignia)
'algeria destroyed' is the wordplay.
'destroyed' indicates an anagram.
'algeria' is an anagram of 'REGALIA'.
'of' acts as a link.
(Other definitions for regalia that I've seen before include "Royal paraphernalia" , "Algeria (anag)" , "Ceremonial robes" , "Insignia of royalty or office" , "ceremonial gear" .)