Cryptic crossword clue
Rough for friend on team in a police dept 12

The most common and most likely answer to this crossword clue is the 12 letter word APPROXIMATED

I've seen this crossword clue in The Daily Telegraph
A
P
P
R
O
X
I
M
A
T
E
D

Buddy explains!

The straight part
We know that "Rough" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case rough = approximated.
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.

What does APPROXIMATED mean?

APPROXIMATED verb
  1. To estimate.
  2. To come near to; to approach.
  3. To carry or advance near; to cause to approach.
APPROXIMATED adjective
  1. Calculated by approximation

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