The most common and most likely answer to this crossword clue is the 7 letter word BRAMBLE
I've seen this crossword clue in Independent
B
R
A
M
B
L
E
More clues leading to the result BRAMBLE
- Chatter aimlessly on second-rate Blackberry?
- Walk by brother to gather berries
- Black rabbit on bush
- Blackberry jam for one in authority
- Bush and Blair at the outset lack organisation
- Chatter pointlessly on black Blackberry
- Source of berries on country walk?
- Blackberry bush found by bishop on gentle walk
- Walk beside local road to collect fruit
- Little Abraham suffered cut after pruning prickly shrub
Buddy explains!

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 BRAMBLE mean?
BRAMBLE noun- Any of many closely related thorny plants in the genus Rubus including the blackberry and likely not including the raspberry proper.
- Any thorny shrub.
- A cocktail of gin, lemon juice, and blackberry liqueur.