Unfortunately, her plans change (8)
I believe the answer is:
shrapnel
'change' is the definition.
(both can mean coins)
'unfortunately her plans' is the wordplay.
'unfortunately' is an anagram indicator (a bad or unfortunate spelling).
'her'+'plans'='herplans'
'herplans' anagrammed gives 'SHRAPNEL'.
(Other definitions for shrapnel that I've seen before include "Metal from exploding artillery shell" , "Bomb or shell fragments" , "Flying debris" , "Scattered pieces from a bursting shell" , "Projectile fragments" .)