Loser (4)
'loser' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for also-ran that I've seen before include "Of racing horse, not placed in first three" , "Not among the first three in race" , "Non-winner in race" , "One of the losers" , "A contestant who loses" .)
(Another definition for alsoran that I've seen is " failure?".)
'loser' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for zero that I've seen before include "See 22" , "You'll find nothing" , "Nothing; freezing point (in degrees centigrade)" , "Japanese fighter" , "Nadir" .)