Be consistent in a disputed conclusion diamonds raise (3,2)
I believe the answer is:
add up
'be consistent in' is the definition.
'add up' can be an answer for 'be' (adding up is a kind of being). I am not sure about the 'consistent in' bit.
'a disputed conclusion diamonds raise' is the wordplay.
'conclusion' says to take the final letters.
'diamonds' becomes 'd' (abbreviation in bridge say).
'raise' becomes 'up' (I've seen this in other clues).
The final letter of 'disputed' is 'd'.
'a'+'d'+'d'+'up'='ADD UP'
Can you help me to learn more?
(Other definitions for add up that I've seen before include "Seem consistent or reasonable - arithmetically?" , "Ring true" , "Sum - make sense" , "Total; make sense" , "Make sense; count" .)