The most common and most likely answer to this crossword clue is the 6 letter word STICKY
I've seen this crossword clue in The Daily Telegraph
S
T
I
C
K
Y
More clues leading to the result STICKY
- Difficult adhesive
- Awkward? Cane boy's bottom
- Unpleasant moment in confines of study
- Difficult to get on with youth leader
- Check into an empty Savoy. It’s close
- Awkward moment in second year
- Gummy bears finally located by second year
- Like glue or like a twig?
- Awkward moment in case of surgery
- Clinging? It’s difficult
Buddy explains!

The straight part
We know that "Clinging/It’s difficult" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case clinging/it’s difficult = sticky.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 STICKY mean?
STICKY noun- A sticky note, such as a post-it note.
- A discussion thread fixed at the top of the list of topics or threads so as to keep it in view.
- A small adhesive particle found in wastepaper.
- A sweet dessert wine.
- (bulletin boards) to fix a thread at the top of the list of topics or threads so as to keep it in view.
- Able or likely to stick.
- Potentially difficult to escape from.
- Of weather, hot and windless and with high humidity, so that people feel sticky from sweating.
- (of a setting) Persistent.
- (of a window) Appearing on all virtual desktops.
- (of threads on a bulletin board) Fixed at the top of the list of topics or threads so as to keep it in view.
- (of a website) Compelling enough to keep visitors from leaving.