AppleScript to clear Finder tags on selected item(s)
--Requires tag app available via homebrew: brew install tag
tell application "Finder"
set fileNames to {}
set theItems to selection
repeat with itemRef in theItems
set end of fileNames to POSIX path of (itemRef as text) & space
end repeat
end tell
do shell script "/usr/local/bin/tag --remove \\* " & fileNames