Irritating, turning smokier (7)
I believe the answer is:
irksome
'irritating' is the definition.
(I've seen this before)
'turning smokier' is the wordplay.
'turning' indicates an anagram.
'smokier' with letters rearranged gives 'IRKSOME'.
(Other definitions for irksome that I've seen before include "'Tedious, tiresome (7)'" , "Tiresome, irritating" , "Annoying or tiresome" , "bugging" , "Annoying - tedious" .)