Graduate takes in a trail from Iberian port (6)
I believe the answer is:
malaga
'iberian port' is the definition.
'graduate takes in a trail' is the wordplay.
'graduate' becomes 'ma' (abbreviation for Master of Arts).
'takes in' indicates putting letters inside.
'trail' becomes 'lag' (both can mean to go behind).
'a'+'lag'='alag'
'ma' placed around 'alag' is 'MALAGA'.
'from' is the link.
(Other definitions for malaga that I've seen before include "Spanish port and resort town" , "Sweet Spanish fortified wine; Picasso birthplace" , "Place" , "Army rank; not shared" , "Andalusian port; wine" .)