Crossword puzzle clue "helping hand that's been lent to the four longest answers"

Helping hand that's been "lent" to the four longest answers

Number of protons by which the elements in the four longest puzzle answers have been enhanced

What have been banished from the four longest answers

Word that's "shifted" in the first four letters of the four longest answers

Angle irons graphically represented by four sets of black squares in this grid, and by letter formations starting in the four longest answers

Org. that has four teams with non-plural nicknames, which begin this puzzle's four longest answers

Guess, in brief (and what's been added to this puzzle's longest answers)

How many letters are in the longest answers in this puzzle - or how many of these answers there are