A place to hide port (4)
I believe the answer is:
aden
'hide port' is the definition.
'aden' can be an answer for 'port' (port in Yemen). I am not certain of the 'hide' bit.
'a place' is the wordplay.
'place' becomes 'den' (den is a kind of place).
'a'+'den'='ADEN'
'to' acts as a link.
Can you help me to learn more?
(Other definitions for aden that I've seen before include "Dane in seaport of Yemen" , "Main port of Yemen" , "Red Sea port" , "Commercial capital of Yemen" , "Port city of Yemen" .)