Slow voyages round the pole (6)
I believe the answer is:
snails
'slow voyages round the pole' is the definition.
I can't tell whether this defines the answer.
'voyages round the pole' is the wordplay.
'voyages' becomes 'sails' (sail is a kind of voyage).
'round' indicates putting letters inside.
'the pole' becomes 'n' (abbreviation for North, as in North Pole).
'sails' placed around 'n' is 'SNAILS'.
Can you help me to learn more?
(Other definitions for snails that I've seen before include "Air-breathing molluscs" , "oath" , "Soft-bodied animals with spiral shells, common in garden" , "Garden creatures" , "Gastropod molluscs" .)