Exploding cigar? No, all natural! (7)
I believe the answer is:
organic
'all natural' is the definition.
(I've seen this in another clue)
'exploding cigar? no' is the wordplay.
'exploding' indicates an anagram.
'cigar'+'no'='cigarno'
'cigarno' anagrammed gives 'ORGANIC'.
(Other definitions for organic that I've seen before include "Biological" , "In cargo (anag.)" , "Got from living matter" , "with carbon involved" , "sort of farming" .)