Possible Clues:

• Arrangements of units that function together
• Be lost taking centre of 2 to gallery?
• Say 'um ...'
• 'Pause, dither (8)'
• Pause - can't be sure that I see migrant
• He would not be quick to have got it eaten
• Pause in uncertainty
• Dislike covering difficult ties and hold back
• Hang back the ties with one that's crooked
• Wait a little for the sea waves to engulf it