Get prepared hound! (5)
I believe the answer is:
beset
'hound' is the definition.
(I've seen this in another clue)
'get prepared' is the wordplay.
'get' becomes 'be' ('get' can mean 'come to be').
'prepared' becomes 'set' (set up or ready).
'be'+'set'='BESET'
(Other definitions for beset that I've seen before include "Press" , "Surround (with problems)" , "Trouble or harass persistently" , "Beleaguer" , "Assail (with problems?)" .)