Possible Clues:

• Small tile of stone or glass in mosaics
• Piece of mosaic Greek god put back
• See star forming a part of a mosaic
• Has the girl got lots of time for mosaic?
• Are conservationists finally determined to give back piece in mosaic
• Return item of value found round outskirts of Rome -- a bit of mosaic
• Hardy character taking a long time to secure tile
• Bit of mosaic shows girl entertaining monarch
• This gives lots of time for the girl to fit into the mosaic
• Hardy lass has time to for a bit of artistic piecework