Animal runs into water-pipe (5)
I believe the answer is:
horse
'animal' is the definition.
(thesaurus)
'runs into water-pipe' is the wordplay.
'runs' becomes 'r' (cricket abbreviation).
'into' indicates putting letters inside.
'water pipe' becomes 'hose' (I've seen this before).
'r' placed into 'hose' is 'HORSE'.
(Other definitions for horse that I've seen before include "See 13" , "Might one be up on this" , "Equine quadruped" , "Steed" , "Drier" .)