The most common and most likely answer to this crossword clue is the 7 letter word SPECIFY
I've seen this crossword clue in The Daily Telegraph
S
P
E
C
I
F
Y
More clues leading to the result SPECIFY
Buddy explains!

The straight part
We know that "Identify" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case identify = specify.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 SPECIFY mean?
SPECIFY verb- To state explicitly, or in detail, or as a condition.
- To include in a specification.
- To bring about a specific result.
- To speak explicitly or in detail (often used with of).