Crossword Genius

Chief in one way demonstrating Churchill's reserve? (3,5)

Ross

I believe the answer is:

war chest

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

'reserve?' is the definition.
The answer and definition can be both related to property as well as being singular nouns.
Maybe they are linked in a way I don't understand?

'chief in one way demonstrating churchill's' is the wordplay.
'chief' becomes 'arch' (synonyms).
'in' indicates putting letters inside.
'one way' becomes 'w' (Compass direction - West).
'demonstrating churchill' becomes 'est' (I can't explain this - if you can you should give a lot more credence to this answer).
'w'+'est'='west'
'arch' placed into 'west' is 'WAR CHEST'.

Can you help me to learn more?

(Other definitions for war chest that I've seen before include "Fighting fund" , "ready for fighting?" , "hypothecated funds" , "funds for action?" , "Funds for a campaign" .)

I've seen this clue in The Telegraph.
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