Ech

9 clues
Level in an org.
R.A.F. formation
Command level: Abbr.
Plane formation: Abbr.
Flying formation: Abbr.
Flight formation: Abbr.
Aircraft formation: Abbr.
Hierarchical level: Abbr.
Level of hierarchy: Abbr.
Similar answers:
&tongued
13,reve
1piece
1sec
2layer
4some
4wheel
A1sauce
Aaabattery
Aaacell
Aaamember
Aaamilne
Aaapaper
Aaarated
Aabatteries
Aabattery
Aacell
Aacells
Aachen
Aae