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4d, D?m??????. Took meal -- actually care about this being kept down.
11a, ?a?m??, Put chap down as no expert.
14a, 3words,4.3.5. N?? A?d ?o?t?, Commits assault then runs off --- details?.
17a, 3words, 3.3.6. ?o? A?? Octave, Show humility ,playing violin badly?.
27a, C?n?n?, Persuasive businessman?.

Dominated
Layman
Nuts and bolts
Bow and scrape
Cogent

DOMINATED
LAYMAN
NUTS AND BOLTS
BOW AND SCRAPE
COGENT

I'll parse any of those if the penny doesn't drop!

Thank mamya and brackendale, finished it now.