Proved to be beneficial to Crossword Clue

Proved to be beneficial to Crossword Clue. This clue appeared on the most recent puzzle Sunday Premier Crossword which is a weekly crossword puzzle that only posts on Sundays as you can probably guess by the name. It must be noted though, that even why the Sunday Premier crossword appears only once a week, it is very difficult and has more clues than a regular crossword so it's very probable that you will stumble upon clues that you can't solve.

PROVED TO BE BENEFICIAL TO Answer:

• AVAILED