Country making substantial contribution to Afghan army (5)

I believe the answer is:

ghana

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'country' is the definition.
(Ghana is an example)

'contribution to afghan army' is the wordplay.
'contribution to' says the answer is hidden in the clue.
'GHANA' can be found hidden inside 'afghan army'.

'making substantial' is the link.
This may not be correct. Some or all of it may belong to another bit of the clue.

Can you help me to learn more?

(Other definitions for ghana that I've seen before include "nation" , "part of Africa" , "Woody raspberry stem" , "West African country, independent since 1957" , "West African republic" .)

I've seen this clue in The Independent.

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