A little extra place for sword (2,3,4)

I believe the answer is:

on the side

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'a little extra' is the definition.
'on the side' can be an answer for 'extra' (thesaurus). I am not sure about the 'a little' bit.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for on the side that I've seen before include "Additionally, maybe illicitly" , "(Of vegetables) firm" , "Like illicit relationship" , "Capped" , "secret?" .)

I've seen this clue in the Sydney Morning Herald.

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