The term 'to a large degree' can be expressed in three different ways in crossword solutions. The first is 'MOSTLY', which is a 6 letter word meaning to a great extent or largely. The second is 'byhalf', which is also a 6 letter word meaning to a great extent or largely. The last is 'inspades', which is an 8 letter word meaning to a great extent or largely. All three of these words can be used to express the idea of something being done to a large degree.