Pest that means trouble to the Poles (5)
I believe the answer is:
snail
'pest that' is the definition.
'snail' can be an answer for 'pest' (I've seen this before). I am unsure of the rest of the definition.
'trouble to the poles' is the wordplay.
'trouble' becomes 'ail' (synonyms).
'to' is a charade indicator (letters next to each other) (I've seen this in other clues).
'the poles' becomes 'SN' (North and South poles).
'ail' put after 'sn' is 'SNAIL'.
'means' acts as a link.
Can you help me to learn more?
(Other definitions for snail that I've seen before include "French delicacy" , "Slow-moving creature" , "Its speed was emulated by Shakespeare's creeping schoolboy" , "Edible gastropod" , "go very slowly" .)