Former spouse was a model, it's revealed (7)
I believe the answer is:
exposed
'revealed' is the definition.
('expose' can be a synonym of 'reveal')
'former spouse was a model' is the wordplay.
'former spouse' becomes 'ex' (an ex-spouse).
'was a model' becomes 'posed' (I've seen this before).
'ex'+'posed'='EXPOSED'
'it's' is the link.
(Other definitions for exposed that I've seen before include "Deprived of protection" , "Brought to light" , "at mercy of weather" , "Not hidden" , "Unmasked, revealed" .)