Small company with work that’s exclusive (5)
I believe the answer is:
scoop
'exclusive' is the definition.
('scoop' can be a synonym of 'exclusive')
'small company with work' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'company' becomes 'co' (abbreviation).
'with' says to put letters next to each other.
'work' becomes 'op' (abbreviation for opus).
's'+'co'+'op'='SCOOP'
'that's' acts as a link.
(Other definitions for scoop that I've seen before include "Ice cream portion" , "Reporting exclusive" , "Waugh novel; some ice-cream" , "Exclusive news item" , "Type of ladle" .)