Crossword Genius

Burden that makes us at some stage cross! (3)

Ross

I believe the answer is:

tax

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

'burden that makes us' is the definition.
'tax' can be an answer for 'burden' (I've seen this before). I am unsure of the remainder of the definition.

'at some stage cross' is the wordplay.
'some stage' indicates anagramming the letters (I've seen 'staged' mean this ('staged' can mean 'organised')).
'cross' becomes 'x' (X is cross-shaped).
'at' is an anagram of 'ta'.
'ta'+'x'='TAX'

Can you help me to learn more?

(Other definitions for tax that I've seen before include "Impose levy or burden on" , "Make heavy demands on as Revenue Commissioners do" , "Charge levied by the state" , "Demand" , "Compulsory contribution towards a country's expenses" .)

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