Left in centre of spooky Portuguese city (6)
I believe the answer is:
oporto
'portuguese city' is the definition.
(I've seen this before)
'left in centre of spooky' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'in' is an insertion indicator.
'centre of' means to look at the middle letters.
The centre of 'spooky' is 'oo'.
'port' going inside 'oo' is 'OPORTO'.
(Other definitions for oporto that I've seen before include "foreign place" , "Iberian location" , "Second largest city in Portugal" , "Iberian city" , "Wine city in Portugal" .)