Litter critter (4)
'litter critter' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for runt that I've seen before include "Turn into smallest of the litter" , "Weakling of the litter" , "Litter-weakling" , "Weak little squealer" , "Weakest animal in a litter" .)
'litter critter' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for cub that I've seen before include "Baby animal, bear say" , "'Baby animal, fox say (3)'" , "Young bear or lion" , "Young lion or fox" , "Young newspaper reporter" .)