Peninsula and related port in the Med (7)
I believe the answer is:
Here is my best explanation:
'peninsula' is the definition.
'related port in the med' is the subsidiary indication.
'related' becomes 'kin' ('kin' can be similar in meaning to 'related').
'port in the med' becomes 'tyre' (Lebanese city).
'and' is the link.
(Other definitions for kintyre that I've seen before include "Mull of -- (song)", "Mull of -------, 1977 UK No1 for Wings", "Mull of - (W. Scotland)" and "Peninsula in western Scotland".)