Measures to deal with pests (5)
I believe the answer is:
steps
'measures' is the definition.
(I know this)
'deal with pests' is the wordplay.
'deal with' indicates an anagram (deal with can mean to organise or sort out).
'pests' is an anagram of 'STEPS'.
'to' is the link.
(Other definitions for steps that I've seen before include "Footfalls" , "Stairs; paces" , "Sequence of foot movements in a dance" , "dancing?" , "Procedures" .)