Greed for money I had to follow up in financial centre (8)

I haven't cracked this one yet — but the brilliant team at Times for the Times have:

UP + I’D (I had) contained by [in] C~ITY (financial centre). I didn’t know this meaning although I now find it has appeared a few times over the years, including a puzzle I blogged in 2012 where it was defined as ‘avarice’. I wondered what it had to do with the god Cupid and found in addition to his erotic duties he is the god of desire more generally, and his name derives from the Latin cupidus meaning ‘eagerly desirous’.