Sea air won't upset poor community (6,4)
I believe the answer is:
shantytown
'poor community' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
'sea air won't upset' is the wordplay.
'sea air' becomes 'shanty' (I've seen this before).
'upset' is an anagram indicator.
'wont' with letters rearranged gives 'town'.
'shanty'+'town'='SHANTYTOWN'
(Other definitions for shantytown that I've seen before include "area of ramshackle housing" , "Deprived urban area of run-down huts" , "Collection of poor dwellings" , "Deprived residential area" , "Area with ramshackle buildings" .)