The most common and most likely answer to this crossword clue is the 2 plus 4 letter word EN BLOC
I've seen this crossword clue in The Daily Telegraph
E
N
B
L
O
C
More clues leading to the result EN BLOC
- As one born in Lancashire town to the west
- As one born in Lancashire town to the north
- As a group once reassembling outside old car firm
- Heard where Henry’s second and fourth stuck their necks out together?
- Note limited group that’s divided city as a whole
- Altogether, Ben misdirected back pass
- Cycle after noble savage all at once
- Central core of bandsmen, Blockheads, forming as a group
- Obstruction mainly by European nations originally acting as one unit
- All together, once resolved to accept cover for bail
Buddy explains!
The straight part
We know that "acting as one unit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case acting as one unit = en bloc.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.