Sleazy type finishing early was suitable (6)
I believe the answer is:
sordid
'sleazy' is the definition.
('sordid' can be a synonym of 'sleazy')
'type finishing early was suitable' is the wordplay.
'type' becomes 'sort' (I've seen this before).
'finishing early' means to remove the last letter.
'was suitable' becomes 'did' (to 'do' can be to be suitable for a task or job).
'sort' with its final letter taken away is 'sor'.
'sor'+'did'='SORDID'
(Other definitions for sordid that I've seen before include "Squalid or ignorable" , "meanness" , "Squalid, not honourable" , "Squalid and depraved" , "Mean and grubby" .)