Father left with daughter in Middle Eastern territory (3,3)
I believe the answer is:
old man
'father' is the definition.
(old man is a kind of father)
'left with daughter in middle eastern territory' is the wordplay.
'left' becomes 'L' (common abbreviation).
'with' means one lot of letters go next to another.
'daughter' becomes 'd'.
'in' means one lot of letters goes inside another.
'middle eastern territory' becomes 'oman' (Middle Eastern country).
'l'+'d'='ld'
'ld' placed within 'oman' is 'OLD MAN'.
(Other definitions for old man that I've seen before include "Informal name for father, husband or ship's captain" , "Husband (inf)" , "Elderly chap" , "Boyfriend" , "Husband - father - boss" .)