Greek with right to embrace king and prince (5,4)
I believe the answer is:
grand duke
'prince' is the definition.
(grand duke is a kind of prince)
'greek with right to embrace king' is the wordplay.
'greek' becomes 'gr' (abbreviation for Greek).
'with' becomes 'and'.
'right' becomes 'due' (due is a kind of right).
'to embrace' indicates putting letters inside.
'king' becomes 'k' (abbreviation for king in chess).
'due' placed around 'k' is 'duke'.
'gr'+'and'+'duke'='GRAND DUKE'
'and' is the link.
(Other definitions for grand duke that I've seen before include "prince" , "European nobleman" .)