Cleaner faces tribunal if dirt is ever recorded (6)
I believe the answer is:
tidier
'cleaner' is the definition.
('tidy' is associated in meaning with 'clean')
'faces tribunal if dirt is ever recorded' is the wordplay.
'faces' indicates taking the first letters (I've seen 'face of' mean this).
The initial letters of 'tribunal if dirt is ever recorded' is 'TIDIER'.
(Other definitions for tidier that I've seen before include "More neat and orderly" , "More trim" , "not so disorderly" , "straightened up?" , "'Neater, in better order (6)'" .)