Hot and steamy pair messing around with clot (8)
I believe the answer is:
tropical
'hot and steamy' is the definition.
(in the tropics)
'pair messing around with clot' is the wordplay.
'messing around with' indicates an anagram.
'pair' with its letters mixed up with 'clot' can make 'TROPICAL'.
(Other definitions for tropical that I've seen before include "Hot and humid, as north and south of the equator" , "Hot and humid type of weather" , "Fervidly hot" , "April-Oct, unusually humid and very hot" , "Found in Cancer or Capricorn" .)