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Cryptic
10A Economise in vain (7) * * E * LESS
12A Machine part can bring back some spirit (6) * * * * S *
1D Camp boy nearly held in evolutionary Cuba (7) B * V * * * *
3D Moderate a painting medium (7) T * M * * * * Is it Tempers?
13D US boy has food almost unbranded (7) * * * * R * C