Cause a capital loss (6)
'loss' is the definition.
The definition and answer are not the same part of speech.
'cause a capital' is the wordplay.
'cause' becomes 'be' (I can't explain this - if you can you should give a lot more credence to this answer).
'a capital' becomes 'head'.
'be'+'head'='BEHEAD'
Can you help me to learn more?
(Other definitions for behead that I've seen before include "Remove cranium as in old execution" , "Execute on the block" , "Knock someone's block off?" , "Decapitate" , "Guillotine" .)
'cause' is the definition.
Although both the answer and definition are verbs in their base form, I don't understand how they can define each other.
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for decapitate that I've seen before include "Behead" , "guillotine" , "remove nut" , "To take top off" .)