Big reveal sees English banker trap unknown figure by safe (8)
I believe the answer is:
exposure
'big reveal' is the definition.
(exposure is revealing something)
'english banker trap unknown figure by safe' is the wordplay.
'english' becomes 'e' (abbreviation).
'banker trap' becomes 'po' (I can't justify this - if you can you should give a lot more credence to this answer).
'unknown figure' becomes 'x' (unknown value in algebra).
'by' says to put letters next to each other.
'safe' becomes 'sure' (I've seen this before).
'po' put after 'x' is 'xpo'.
'e'+'xpo'+'sure'='EXPOSURE'
'sees' acts as a link.
Can you help me to learn more?
(Other definitions for exposure that I've seen before include "public attention" , "Openness" , "Lack of shelter" , "Act of laying open or bare" , "Revelation (of something secret)" .)