One can take steps to control them (5)
I believe the answer is:
pests
'control them' is the definition.
I can't tell whether this definition defines the answer.
'one can take steps' is the wordplay.
'steps' anagrams to 'PESTS'.
Though, I'm unsure how the anagram is indicated.
'to' is the link.
Can you help me to learn more?
(Other definitions for pests that I've seen before include "Take steps to troublesome animal." , "Steps (anag.)" , "Steps taken about nuisances" , "Persistently annoying persons" .)