List of competitors is in lobby (5)
I believe the answer is:
entry
I believe this is a triple definition!
'list of competitors' is the first definition.
(I've seen this before)
'is in' is the second definition.
(thesaurus)
'lobby' is the third definition.
(thesaurus)
(Other definitions for entry that I've seen before include "Door; appearance" , "Admittance" , "Way in; item in list" , "List of candidates" , "One in competition" .)