Telegraph Cryptic Connections Puzzle For This Week

[Matakari]

Good evening, I'm stuck on these three for the Telegraph Cryptic Connections quiz. Some help, please! Thanks in advance!

3 Record backing son over source of revolution? (5)
4 Work out when one leaves second factory shift (10)
5 Crust eaten by German in mill? (7)

[fiction-factory]

epson? Will start with EP anyway I think

[fiction-factory]

or sep rather

[cashier]

5 Grinder

[cashier]

4 Transplant

[fiction-factory]

Good one cashier train minus the i, +s +plant

[fiction-factory]

Good one cashier: train minus the i, +s +plant

[cashier]

3 Pedal ep and lad reversed

[Matakari]

Many thanks, all! The last one which I thought I had right.
1 Stones with initially naff cover (6)

[fiction-factory]

what letters do you have please?

[cashier]

Screen

[fiction-factory]

Another good one- I got the final N but never thought of SCREE.
I assume this is a quiz not a crossword so there are no known patterns

[Matakari]

Fiction factory, the clue is:

1 Stones with initially naff cover (6)

[fiction-factory]

^ yes, that's why I agreed with SCREE+N

[Matakari]

Thanks, all, I think I've got it right now. Just one final verification. For this one I have GALLERY:

2 Walk right into where cook might be (7) ??????? (GALLERY?)

[Captain2]

Yes, R(ight) inside GALLEY

[Matakari]

Great, Captain2, thanks !