Trains to Wrigley Field (3)
I believe the answer is:
els
'trains to wrigley field' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for els that I've seen before include "South African golfer" , "Ernie - - (golfer)" , "Successful owner of several clubs" , "US urban railways" , "Golfer; elevated railways" .)