The most common and most likely answer to this crossword clue is the 7 letter word DRIBLET
I've seen this crossword clue in The Guardian
D
R
I
B
L
E
T
More clues leading to the result DRIBLET
- Drop fowl from behind, having permit
- Little water fowl back to meet obstruction
- Backing singer maybe hired out for a small amount
- Maybe phone Robin up for a wee drap?
- Call time, previously knocking back small amount of liquid
- Gannet possibly rising to allow drop
- Bird going over obstacle in a small stream
- Crane, for one, goes up with permitted small quantity
- Dilbert edited a slight amount
- Film following flyer sent up and left to drop
Buddy explains!

The straight part
We know that "drop" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case drop = driblet.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 DRIBLET mean?
DRIBLET noun- A small portion or part.
- A small or petty sum.