13 across
Start
to
neuter
rescue
strays
and
put
down
(7)
Start to neuter rescue strays and put down (7)
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The definition is at the end of the clue.
How the clue works
The definition is put down, meaning to criticise or censure. The wordplay takes N ("Start to neuter", first letter) plus an anagram ("strays") of RESCUE to give CENSURE.