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'm unsure 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' is a charade indicator (letters next to each other).
'wet' becomes 'rain' (wet weather).
'bah'+'rain'='BAHRAIN'
'that's' acts as a 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" .)