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I sing sweet, though I've not a lip,

Or hand, though still I easy grip,

That's me in hand, I'm worth much more

Than there a bush of two, three, four

To smartly get all, you have thrown,

A hit both with a single stone.

'You've no lip? You've a lot of lip on you!'
'Even those without lips can be lippy.'

Riddle Answer A Bird

Riddle Explanation
that's me in hand, I'm worth much more than there a bush of two, three, four - a bird in hand (is worth two in the bush).

to smartly get all, you have thrown, a hit both with a single stone - to kill two birds with one stone.