A place that hasn't come to the fore as a seaside resort? (9)
I believe the answer is:
backwater
'a place that hasn't come to the fore as a seaside resort?' is the definition.
'backwater' can be an answer for 'a place' (I have seen 'Isolated place' mean 'backwater' so perhaps 'place' could also mean 'backwater'). I'm unsure of the remainder of the definition.
'a place that hasn't' is the wordplay.
'a place' becomes 'back' (back is a kind of place).
'that hasn't' becomes 'water' (I can't justify this - if you can you should give a lot more credence to this answer).
'back'+'water'='BACKWATER'
Can you help me to learn more?
(Other definitions for backwater that I've seen before include "in the sticks" , "Isolated spot" , "Place where no development happens" , "Isolated place" , "Stagnant part of a river" .)