Monaco's first in lists for race venue (2,4)
I believe the answer is:
'race venue' is the definition.
'Le Mans' can be an answer for 'race' (thesaurus). I am not sure about the 'venue' bit.
'monaco's first in lists' is the wordplay.
'monaco's first' becomes 'm' (1st letter of 'monaco').
'in' is an insertion indicator.
'lists' becomes 'leans' (I've seen this in other clues).
'm' inserted into 'leans' is 'LE MANS'.
'for' is the link.
Can you help me to learn more?
(Other definitions for le mans that I've seen before include "French motor-race venue" , "Place" , "French race track" , "French car racing track" , "French city renowned for sports car race" .)