Related Clues:

• Tight, as a drum head
• Opposite of slack
• Like a tightrope, more so than a slackline
• Tutored in speech as not relaxed
• Launch an attack on someone, verbally
• Tense, given instruction in the auditorium
• Like school pupil sounding unrelaxed
• Like skin after Botox
• Not at all slack
• Lose one's temper with someone with sling
• Loose antonym
• Like cello strings
• Not drooping, like a string
• Not hanging loose
• Like drumheads