Identification of an overthrown dynasty (6)
I believe the answer is:
naming
'identification' is the definition.
(thesaurus)
'an overthrown dynasty' is the wordplay.
'overthrown' says the letters should be written in reverse.
'dynasty' becomes 'ming' (I've seen this before).
'an' backwards is 'na'.
'na'+'ming'='NAMING'
'of' is the link.
(Other definitions for naming that I've seen before include "Identifying; mentioning" , "Christening" , "Conferring appellation on" , "Allotting term to" , "Calling" .)