Company was boastful (4)
I believe the answer is:
crew
I believe this clue is a double definition.
'company' is the first definition.
(a group of people)
'boastful' is the second definition.
(I've seen this before)
'was' is the link.
(Other definitions for crew that I've seen before include "clapped themselves?" , "Work gang" , "Ship's operators" , "Squad" , "Personnel (on ship perhaps?)" .)