The most common and most likely answer to this crossword clue is the 3 plus 4 letter word GUM TREE
I've seen this crossword clue in The Guardian
G
U
M
T
R
E
E
More clues leading to the result GUM TREE
- Bloke cut metre off plant from Australia
- Short piece on metre-high eucalyptus
- Fool withdraws support round river, up which you’re stuck
- Awkward situation for gourmet — freezer being regularly empty
- Awkward place to be met urge to change
- Up here’s problematic for Marguerite, uncomfortable and lacking fresh air
Buddy explains!
The straight part
We know that "up which you’re stuck" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case up which you’re stuck = gum tree.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.