This guy's off base


1 Answer 4 letters
Awol 4 letters
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A crossword editor has to be very careful when changing one--unlike this puzzle's editor, who was careless four times herein
Bone that Napoleon Dynamite's grandma broke after falling off her dune buggy
Skilled showoff
Punk-rock offshoot
First word across in the first-ever crossword (1913) and the first of a dozen appearances of the word in this puzzle's grid, written word search-style (left, right, down, and diagonally) ... Can you f
2005 Black Eyed Peas hit that Pitchfork called "so monumentally vacuous, slapped together and tossed-off that it truly tests the definition of 'song.'
Four-time baseball All-Star Jose
Turkish officer
Coffee shop worker
Retired outfielder Barry, who was conspicuously denied entry to the Baseball Hall of Fame in 2013
Baseball's Fielder
Abbr. in some office titles
Home run, in baseball slang
Sail off-course
Break off a relationship
Baghdad-based Broadway musical
All, e.g., for this answer's last six letters?
Coffeehouse specialist
Am I off-base here?
Activity suggested by this puzzle's theme entries
Sounds coming from a doctor's office
Roman army officer
Hideo, Major League Baseball's winningest Japanese pitcher
An official lang. of Kenya
Offend
Partially obscured (and a hint to this puzzle's theme)
Alternative title of this puzzle, in view of what can be placed in front of the answers to the 10 asterisked clues
Annual cause of losing an hr.'s sleep hidden in this puzzle's 10 longest answers
Insurance-office mail
Trunk offshoot