All answers are popular items found in a Christmas hamper
No. 2. When sorted it's extreme greed with no end (6)
No. 3. Jammy sleeping places on fools day (8)
No. 4. Any can be used if the tempest rises (4)
No. 5. There's a kernel in what looks like nothing(6)
No. 7. Novice has these in his Worcester sauce. (9)
No. 9. Pondered over and go on about. (6/4)
No. 12. Might be of little value but very tasty (6)
No. 13. Saddled shaped fragments housed in a cylinder (8)
No. 15. There's a hole in this drink senior! (6)
No. 18. Did actor Colin go wrong on the prong(6/7)
No. 19 middlemen for marital go between (11)