Related Clues:
- A bit sour like open cake
- A bit sour, like flattish pie
- Open pastry filled with apple or jam
- Acid or tart
- Acid or caustic
- Pie with fruit filling
- Tasting sharp like stale milk
- Somewhat sour like flat cake
- Open cake with jam etc
- Tasting sour like a lemon
- Sour-tasting pie?
- 'Having a sharp, biting taste (4)'
- Sharp or sour in taste
- Flat pie
- However sweet, you'll not find her an 11 across