2672: Seamless schemes
The eight unclued lights are of a kind. Across 1 One slandering and misrepresenting our claimant (11) 7 Purpose of Maoism oddly forgotten (3) 11 Trees concealing old furrow (6) 13 Bitterness of soldier on the radio (7) 15 Signature is tamper-proof, to some extent (5) 17 Sturdy or, conversely, broken? (6) 18 French here