Single note on summary from lawyer in Ireland is too complex to read (12)
I believe the answer is:
indigestible
'lawyer in ireland is too complex to read' is the definition.
I can't tell whether this definition defines the answer.
'single note on summary' is the wordplay.
'single' becomes 'i' (one).
'note' becomes 'nible' (I can't explain this - if you can you should give a lot more credence to this answer).
'on' means one lot of letters goes inside another (as in clothing \'on\' a person).
'summary' becomes 'digest' (I've seen this before).
'nible' going around 'digest' is 'ndigestible'.
'i'+'ndigestible'='INDIGESTIBLE'
'from' is the link.
Can you help me to learn more?
(Other definitions for indigestible that I've seen before include "hard to take in" , "can be hard to stomach" .)