The most common and most likely answer to this crossword clue is the 7 letter word DETAILS
I've seen this crossword clue in The Daily Telegraph
D
E
T
A
I
L
S
Buddy explains!

The straight part
We know that "Specific info needed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case specific info needed = details.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 DETAILS mean?
DETAILS noun- Something small enough to escape casual notice.
- A profusion of details.
- The small things that can escape casual notice.
- Something considered trivial enough to ignore.
- A person's name, address and other personal information.
- (law enforcement) A temporary unit or assignment.
- An individual feature, fact, or other item, considered separately from the whole of which it is a part.
- A narrative which relates minute points; an account which dwells on particulars.
- A selected portion of a painting
- To explain in detail.
- To clean carefully (particularly of road vehicles) (always pronounced. /ˈdiːteɪl/)
- To assign to a particular task