Slow mover snared pole in spinnaker (5)
I believe the answer is:
snail
'slow mover' is the definition.
(snails move very slowly)
'pole in spinnaker' is the wordplay.
'pole' becomes 'n' (abbreviation for North, as in North Pole).
'in' means one lot of letters goes inside another.
'spinnaker' becomes 'sail' (I've seen this in another clue).
'n' put into 'sail' is 'SNAIL'.
'snared' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for snail that I've seen before include "Edible terrestrial mollusc" , "Sluggish person - kind of mail" , "Slow-moving 12" , "Soft-bodied garden animal with shell" , "French delicacy" .)