Former spouse mentioned being agitated (7)
I believe the answer is:
excited
'being agitated' is the definition.
('excited' can be similar in meaning to 'agitated')
'former spouse mentioned' is the wordplay.
'former spouse' becomes 'ex' (an ex-spouse).
'mentioned' becomes 'cited' ('cite' can be a synonym of 'mention').
'ex'+'cited'='EXCITED'
(Other definitions for excited that I've seen before include "Thrilled; agitated" , "Aroused; eager" , "In a stir" , "in agitated state" , "Aroused, enthused" .)