Disturbed when not paid yet (9)
I believe the answer is:
unsettled
'disturbed' is the definition.
(I know that disturbed can be written as unsettled)
'not paid yet' is the wordplay.
'not' becomes 'un' (prefix meaning 'not').
'paid yet' becomes 'settled' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'un'+'settled'='UNSETTLED'
'when' is the link.
Can you help me to learn more?
(Other definitions for unsettled that I've seen before include "Troubled" , "outstanding" , "Changeable" , "a forecast of "showery"?" , "(Of weather) lacking stability" .)