Swindles current in royal society? (5)

I believe the answer is:

ramps

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'swindles' is the definition.
Although both the answer and definition are verbs in their -s form, I don't see how they can define each other.

'current in royal society?' is the wordplay.
'current' becomes 'amp' (electricity).
'in' is an insertion indicator.
'royal society?' becomes 'RS'.
'amp' inserted within 'rs' is 'RAMPS'.

Can you help me to learn more?

(Other definitions for ramps that I've seen before include "Slopes to calm traffic" , "Gradients" , "Small road ridges for prams" , "Sloping passages" , "Slopings passages" .)

I've seen this clue in the Evening Standard.

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