First lady entering the velodrome? (3)
I believe the answer is:
eve
'first lady' is the definition.
(I've seen this before)
'entering the velodrome?' is the wordplay.
'entering' says the answer is hidden in the clue.
'EVE' is hidden within 'the velodrome'.
(Other definitions for eve that I've seen before include "Lady of the previous night" , "Woman of Eden" , "Later in the day, in short" , "'All About - - ' (Bette Davis film)" , "See 27" .)