Dear old flame, broody (9)
I believe the answer is:
expensive
'dear' is the definition.
(similar in meaning)
'old flame broody' is the wordplay.
'old flame' becomes 'ex' (an ex-lover).
'broody' becomes 'pensive' (synonyms).
'ex'+'pensive'='EXPENSIVE'
(Other definitions for expensive that I've seen before include "Charging a lot" , "Pricey" , "not going for a song" , "priceless" , "High in price" .)