Like some professors' suits (6)
I believe the answer is:
tweedy
'like some professors' suits' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for tweedy that I've seen before include "like countryside alliance ..." , "like country gentry" , "like upper-class countryfolk?" , "Of a robust conservative or rural character" , "Like rough woollen cloth" .)