Inclines to have millions invested in race venue (2,4)
I believe the answer is:
le mans
'race venue' is the definition.
(as in 24 Hours of Le Mans)
'inclines to have millions' is the wordplay.
'inclines' becomes 'leans' ('lean' can be a synonym of 'incline').
'to have' is an insertion indicator.
'millions' becomes 'm' (abbreviation for millions).
'leans' placed around 'm' is 'LE MANS'.
'invested in' is the link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for le mans that I've seen before include "French town" , "French 24-hour motor race" , "French racetrack" , "French city renowned for sports car race" , "Place" .)