Crossword puzzle clue "letters dropped from six answers come together here"

Letters dropped from six answers "come together" here

Gather ye here letters dropped from eight answers

On 8/21/1911 the subject (the letters dropped from the starred answers) was ___

Campaign about which Rumsfeld said in 2003 "it could last six days, six weeks - I doubt six months"

It's dropped after a bomb is dropped

Really come down, as illustrated by hidden words in six starred answers

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

Treasure chest coins represented graphically by two consecutive letters in six puzzle answers (including this one)