  A coherent state of many spins contains quantum entanglement which increases
with a decrease in the collective spin value. We present a scheme to engineer
this class of pure state based on incoherent spin pumping with a few collective
raising/lowering operators. In a pumping scenario aimed for maximum
entanglement, the steady-state of N pumped spin qubits realizes the ideal
resource for the 1 to N/2 quantum telecloning. We show how the scheme can be
implemented in a realistic system of atomic spin qubits in optical lattice.
Error analysis show that high fidelity state engineering is possible for N ~
O(100) spins in the presence of decoherence. The scheme can also prepare a
resource state for the secret sharing protocol and for the construction of
large scale Affleck-Kennedy-Lieb-Tasaki (AKLT) state.
