Ex model about to tour Florida (3,5)
I believe the answer is:
old flame
'ex' is the definition.
(I've seen this in another clue)
'model about to tour florida' is the wordplay.
'about' indicates an anagram.
'to tour' is an insertion indicator (to tour can mean to go around).
'florida' becomes 'fla' (abbreviation).
'model' anagrammed gives 'oldme'.
'oldme' placed around 'fla' is 'OLD FLAME'.
(Other definitions for old flame that I've seen before include "Former partner" , "Former lover" , "still 1 across [ALIGHT], it seems" , "Former sweetheart" , "Ex-lover - the fire still burns" .)