Similar tit, cuckoo and hawk (10)
I believe the answer is:
militarist
'hawk' is the definition.
(thesaurus)
'similar tit cuckoo' is the wordplay.
'cuckoo' is an anagram indicator.
'similar'+'tit'='similartit'
'similartit' with letters rearranged gives 'MILITARIST'.
'and' acts as a link.
(Other definitions for militarist that I've seen before include "Student of science of war" , "one worshipping war" .)