State positively and loudly within a company (6)
I believe the answer is:
affirm
'state positively' is the definition.
(I've seen this before)
'loudly within a company' is the wordplay.
'loudly' becomes 'f' (A musical term).
'within' means one lot of letters goes inside another.
'company' becomes 'firm' (I've seen this before).
'a'+'firm'='afirm'
'f' placed within 'afirm' is 'AFFIRM'.
'and' is the link.
(Other definitions for affirm that I've seen before include "Uphold" , "Declare, assert" , "Confidently put" , "Solemnly declare" , "State positively" .)