Pup (5)
'pup' is the definition.
(I know that pup can be written as whelp)
This is the entire clue.
(Other definitions for whelp that I've seen before include "Puppy- young wolf" , "Boy!" , "Cur" , "Young pup" , "Give birth to (a puppy)" .)
(Other definitions for tent that I've seen before include "some guys held on to?" , "Cloth shelter" , "Canvas shelter; wine" , "Guy" , "Temporary residence" .)