Crossword puzzle clue "difficult to get along with probably"

Difficult to get along with, probably

Beer brand at this little show at an obscure venue in Brooklyn you've probably never heard of, probably

Letters on a can at a concert for a band you've probably never heard of and probably wouldn't even understand if I told you how good they are

Get into a difficult spot

Difficult to get through

More difficult to get through to

Things really get difficult when . . .

Mined element in "Avatar" creatively named for how it's difficult to get