Got down to making a proposal? (5)

I think it could be either:

Which length description are you looking for?:

knelt

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'got down' is the definition.
(I've seen this before)

I cannot understand how the remainder of the clue works.

(Other definitions for knelt that I've seen before include "Rested on the knees" , "Rested on bent legs" , "... for which one might have done this" , "Got down (to propose)" , "Rested on a bent leg" .)

I've seen this clue in The Globe and Mail.

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