Possible Clues:

• Like mum and dad?
• As are mum and dad, running this way and that?
• Reading the same forwards and backwards
• The same either way
• Like 'dad' or 'mum'?
• Coming back for a spell as before
• Like rotator, deified
• A Swedish soprano in concert, one caught like 51
• Prim lad with coin that's milled? Bob may be described thus
• Reading the same backwards and forwards