Crossword Genius

About revolutionary's secret stock (5)

Ross

I believe the answer is:

cache

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

'secret stock' is the definition.
'cache' can be an answer for 'stock' (cache is a kind of stock). I am unsure of the 'secret' bit.

'about revolutionary's' is the wordplay.
'about' becomes 'ca' (abbreviation for 'circa').
'revolutionary' becomes 'che' (Che Guevara the Marxist revolutionary).
'ca'+'che'='CACHE'

Can you help me to learn more?

(Other definitions for cache that I've seen before include "Nest egg" , "Hiding place for treasure etc" , "what things could be stored in" , "memory" , "Secret hiding place" .)

I've seen this clue in the Sydney Morning Herald.
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