Personal qualities frequently destroy repeatedly on board? (4,6)

'personal qualities frequently' is the definition.
I know nothing about this answer so I can't judge whether this works.

'destroy repeatedly on board?' is the wordplay.
I cannot really understand how this works, but
'destroy' could be 'kill' (to kill is to destroy) and 'kill' is located in the answer.
'repeatedly' could be 'oft' (I've seen this in another clue) and 'oft' is found in the answer.
'on board?' could be 'ss' (I've seen this in other clues) and 'ss' is present in the leftover letters.
A single letter 's' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).