Like clones in citadel roaming (9)
I believe the answer is:
identical
'like clones' is the definition.
(I've seen this in another clue)
'in citadel roaming' is the wordplay.
'roaming' indicates an anagram.
'in'+'citadel'='incitadel'
'incitadel' anagrammed gives 'IDENTICAL'.
(Other definitions for identical that I've seen before include "Not any different" , "lacking distinction" , "showing no change" , "Indistinguishable" , "uniform" .)