Exclude workers in tightly-fitting trousers (3,5)
I believe the answer is:
ski pants
'tightly-fitting trousers' is the definition.
'exclude workers' is the wordplay.
'exclude' becomes 'skip'.
'workers' becomes 'ants' (I've seen this before).
'skip'+'ants'='SKI PANTS'
'in' is the link.
(Other definitions for ski pants that I've seen before include "Garments" , "Winter sports wear" , "Trousers" , "Gear employed descending mountain" .)