Notedly slow movement during work (5)

I believe the answer is:

lento

I'm a little stuck... Click here to teach me more about this clue!

'notedly' is the definition.
Both the answer and definition are adverbs.
Perhaps they are linked in a way I don't understand?

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for lento that I've seen before include "(When playing music) slowly" , "Scored slowly" , "Slow (mus.)" , "Old sayings" , "How one scores slowly" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app