21a. Look! Large tank is a green colour (5) _ _ _ _ T
23a. Half-picked honest upset with reading scheme (9) _ _ O _ _ _ I _ S
26a. First Brian, allow to borrow mix (5) _ _ E _ D
27a. Coming into being, a little sodium has aroma (7) _ _ S _ E _ _
18d. Seventh group member stirring lean hog (7) H _ _ _ G_ _
23d. Entering plot, I showed the way (5) _ _ L _ _
24d. Wobble coming back, dropping first box to jostle (5) _ _ _ _ W (is it 'elbow'?)