Ah- I thought the word cover was part of the clue (c over ).
Thought it might end fraction (or operation) but fraction dont fit.
Cant see a 10 letter word what fits your letters
Well done Cashier. I was fooled into thinking by the spacing that it were 5,10 not 6,9. I was nearly there and actualy checked if toperation is a real word
When I solved this yesterday, the OP said it was 5,10- and I suggested that Covert Operation would work for 6,9. He/she said the letter count was wrong.