Possible Clues:

• Ceremonial procedure by enthusiast, nothing held back
• Restrained tango breaks hectic routine
• Musical direction we hear written out badly
• Immediately reducing in speed (music)
• Restrained ceremony offered by Brazil, say, with love
• Slowing of musical tempo
• Shocking riot outside, English fan restrained
• Ceremony with character adds to a sudden slowdown
• Direction to slow down tune trio ruined
• Holding back opposing player in Eton rugby scrum ...