Declare formally to be true (6)
I believe the answer is:
affirm
(Other definitions for affirm that I've seen before include "State as a fact, assert" , "Substantiate" , "Declare, assert" , "Solemnly declare" , "Confidently put" .)
I believe the answer is:
affirm
(Other definitions for affirm that I've seen before include "State as a fact, assert" , "Substantiate" , "Declare, assert" , "Solemnly declare" , "Confidently put" .)