The most common and most likely answer to this crossword clue is the 7 letter word MEGABIT
I've seen this crossword clue in The Daily Telegraph
M
E
G
A
B
I
T
More clues leading to the result MEGABIT
- Margaret has rather a lot of data
- Yours truly prattling Information Technology, much computerese
- Big team playing — a lot of information needed
- Lots of information came across, one sack being carried up
- Mixed bag item in storage unit
- 1000, say; slightly more ones and zeroes
- Storage unit chanced upon, containing one piece of luggage flipped over
Buddy explains!

The straight part
We know that "a lot of information needed" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a lot of information needed = megabit.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 MEGABIT mean?
MEGABIT noun- 106 = 1,000,000 bits or 125,000 bytes (125 kilobytes)
- 220 = 1,048,576 bits; a mebibit
- One megabit per second