Promise action (10)

I believe the answer is:

engagement

I believe this clue is a double definition.

'promise' is the first definition.
(I know that engagement is a type of promise)

'action' is the second definition.
(I know that engagement is a type of action)

(Other definitions for engagement that I've seen before include "get this in the diary?" , "before wedding" , "Date, battle, or betrothal" , "pledge between 11 & 6 [WILLIAM & KATE]" , "Gig" .)

I've seen this clue in The Telegraph.

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