Crossword Genius

Makes marginal movement sideways (5)

Ross

I believe the answer is:

edges

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'makes' is the definition.
The answer and definition can be both to do with motion as well as being verbs in their -s form.
Perhaps they are linked in a way I don't understand?

'marginal movement sideways' is the wordplay.
'marginal' becomes 'edge' (synonyms).
'movement sideways' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'edge'+'s'='EDGES'

Can you help me to learn more?

(Other definitions for edges that I've seen before include "They're used for cutting" , "They're farthest from the middle" , "Margins" , "Borders, rims" , "Slowly moves" .)

I've seen this clue in the Evening Standard.
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