A bit of a bombshell disrupted her plans (8)
I believe the answer is:
shrapnel
'a bit of a bombshell' is the definition.
I can't judge whether this defines the answer.
'disrupted her plans' is the wordplay.
'disrupted' is an anagram indicator.
'her'+'plans'='herplans'
'herplans' anagrammed gives 'SHRAPNEL'.
Can you help me to learn more?
(Other definitions for shrapnel that I've seen before include "Projectile fragments" , "Dangerous fragments" , "Colloquially, small change" , "Fall out from bomb" , "Exploding shell fragments" .)