Possible Clues:

• Temporary deviation from strict tempo
• Difficulty, a Tardis initially with zero time variation
• In a relaxed rhythm, musically
• Not strictly keeping to time in game, almost fail to declare?
• Having the freedom musically in Russia to join club for nothing
• With flexibility in tempo
• Right about improvised flexibility of tempo
• Modified rhythm to massage a short digit
• Not in tempo
• Fluctuation of musical tempo