GP's location that's unsatisfactory and wet (7)
I believe the answer is:
bahrain
'gp's location' is the definition.
'Bahrain' can be an answer for 'location' (Bahrain is an example). I am not certain of the 'gp's' bit.
'unsatisfactory and wet' is the wordplay.
'unsatisfactory' becomes 'bah' (I can't explain this - if you can you should believe this answer much more).
'and' says to put letters next to each other.
'wet' becomes 'rain' (wet weather).
'bah'+'rain'='BAHRAIN'
'that's' is the link.
Can you help me to learn more?
(Other definitions for bahrain that I've seen before include "Gulf region?" , "kingdom in Middle East" , "Gulf state" , "Gulf sheikhdom, capital Manama" , "Island country in the Persian Gulf" .)