Western delta is wild -- around November it rarely dries out (7)
I believe the answer is:
wetland
'it rarely dries out' is the definition.
(wet area which is not normally dry)
'western delta is wild around november' is the wordplay.
'western' becomes 'w'.
'is wild' indicates anagramming the letters.
'around' means one lot of letters goes inside another.
'november' becomes 'N' (phonetic alphabet: alpha, bravo, charlie etc.).
'delta' with letters rearranged gives 'etlad'.
'etlad' going around 'n' is 'etland'.
'w'+'etland'='WETLAND'
(Other definitions for wetland that I've seen before include "Marshy area" , "Boggy territory" .)