Sultry redhead seen in local (8)
I believe the answer is:
tropical
'sultry' is the definition.
(thesaurus)
'redhead seen in local' is the wordplay.
'redhead' becomes 'r' (the head/first letter of 'red').
'seen in' means one lot of letters goes inside another.
'local' becomes 'topical' ('topical' can be similar in meaning to 'local').
'r' going inside 'topical' is 'TROPICAL'.
(Other definitions for tropical that I've seen before include "it could be too hot" , "Of regions north and south of the Equator" , "Belonging to hot regions" , "Fervidly hot" , "Describes weather that is hot and humid" .)