Money heading off major loss shown in production of figures on paper (5,7)
I believe the answer is:
brass rubbing
'loss shown in production of figures on paper' is the definition.
I can't judge whether this defines the answer.
'money heading off major' is the wordplay.
'money' becomes 'brass' (I've seen this before).
'heading' means one lot of letters go next to another (some letters go in front of or head others).
'off major' becomes 'rubbing' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'brass'+'rubbing'='BRASS RUBBING'
Can you help me to learn more?
(Another definition for brass rubbing that I've seen is " Reproduction of commemorative plaques on paper".)