Good fortune to have account identification in copper-plate (8)
I believe the answer is:
accident
'good fortune' is the definition.
'accident' can be an answer for 'fortune' (I've seen this before). I am unsure of the 'good' bit.
'account identification in copper-plate' is the wordplay.
'account' becomes 'acc'.
'identification in copper plate' becomes 'ident' (I can't explain this - if you can you should give a lot more credence to this answer).
'acc'+'ident'='ACCIDENT'
'to have' acts as a link.
Can you help me to learn more?
(Other definitions for accident that I've seen before include "Chance event with no apparent cause" , "Dance tic leading to mishap" , "disaster" , "Calamity" , "Unexpected and unplanned event" .)