I lock pets out, finding hoard (9)
I believe the answer is:
stockpile
'hoard' is the definition.
(I've seen this before)
'i lock pets out' is the wordplay.
'out' is an anagram indicator (out can mean wrong or inaccurate).
'i'+'lock'+'pets'='ilockpets'
'ilockpets' anagrammed gives 'STOCKPILE'.
'finding' acts as a link.
(Other definitions for stockpile that I've seen before include "Accumulated goods" , "Store in large quantities" , "Reserve supply (of weapons)" , "Amass" , "Save" .)