11) Could go ahead (6) V _ A _ L _
12) Persistently negative person (8) _ O _ _ _ _ _ W
16) Paint roughly (4) _ _ _ _
26) Humbling process (9) A _ A _ A _ E _ T
27) European bunting (12) Y E L L O W H _ E _ E R
4) Not substantial (4) S L I M?
6) Determined attempt (6) E _ S _ _ _
7) Device producing tremolo (9) T _ T _ _ _ _ _ T
10) Ignoring instructions (11) N O N _ _ _ D _ ENT
17) Natural deposit of fuel (4,4) C O A L / F A C E?