[cyode]

Stretching? Never! I see your 4-clue, o1, and raise you “QUEUE” for 5:

  - Line (Standing in the queue…)
  - London (they’re all queued up, innit?)
  - Log (*backend distsys handwaving*)
  - Mail (what do you think an inbox is, anyway?!)
  - Round (homophone “Q” is a typographically round letter)

[paulddraper]

I think Round may be invalid but in any case I would not have gotten it.