Making speed from the stronghold (8)

I believe the answer is:

fastness

I'm a little stuck... Click here to teach me more about this clue!

This clue might be a double definition.

'making speed' is the first definition.
'fastness' can be an answer for 'speed' (fastness is a kind of speed). I'm not sure about the 'making' bit.

'the stronghold' is the second definition.
(I've seen this in another clue)

'from' acts as a link.

Can you help me to learn more?

(Other definitions for fastness that I've seen before include "quality of not fading" , "Keep" , "Strongly fortified defensive place" , "speed?" , "Secure refuge" .)

I've seen this clue in the Evening Standard.

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