Queen about to trap on the first file? (6)
I believe the answer is:
regina
'queen' is the definition.
(Latin for 'queen')
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for regina that I've seen before include "ER, Elizabeth ..." , "monarch" , "Queen (Latin)" , "in Canada" , "Queen (in lawsuits)" .)