Finding it beyond one, which is extraordinary (7)
I believe the answer is:
notable
'is extraordinary' is the definition.
(thesaurus)
'finding it beyond one' is the wordplay.
I cannot quite see how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found within the answer.
'one' could be 'a' and 'a' is found in the answer.
The remaining letters 'noble' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'which' acts as a link.
Can you help me to learn more?
(Other definitions for notable that I've seen before include "Great" , "Worthy of remark" , "Big noise" , "Unusual" , "Worthy of attention, significant" .)