Agitated to find it hasn't been paid (9)
I believe the answer is:
unsettled
'agitated' is the definition.
(thesaurus)
'it hasn't been paid' is the wordplay.
I cannot really understand how this works, but
'it' could be 't' (abbreviation. e.g. in 'tis) and 't' is found in the answer.
'been' could be 'led' (leading is a kind of being) and 'led' is found within the answer.
The remaining letters 'unset' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
'to find' acts as a link.
Can you help me to learn more?
(Other definitions for unsettled that I've seen before include "Changeable" , "Missing work by composer, perhaps" , "Liable to change or upset" , "Uneasy - pending - vagrant" , "Restless" .)