Though slow, it'll go smoothly round the point (5)
I believe the answer is:
snail
'though slow it'll' is the definition.
I can't tell whether this definition defines the answer.
'go smoothly round the point' is the wordplay.
'go smoothly' becomes 'sail' (I've seen this in another clue).
'round' means one lot of letters goes inside another.
'the point' becomes 'N' (North).
'sail' placed around 'n' is 'SNAIL'.
Can you help me to learn more?
(Other definitions for snail that I've seen before include "Slow slithery mollusc" , "dawdler" , "Gastropod mollusc" , "Edible terrestrial mollusc" , "go very slowly" .)