The most common and most likely answer to this crossword clue is the 7 letter word STROPPY
I've seen this crossword clue in Financial Times
S
T
R
O
P
P
Y
More clues leading to the result STROPPY
- Cross, see, after drinking port up
- Difficult spot in which to turn left
- Bad tempered mole left to retire indoors
- Quarrelsome left back blocking a couple of Spurs’ youngsters at the start
- Look to restrict left back, awkward to deal with
- Turning left? See peripheral, awkward to deal with
- Left reclining in the embrace of James Bond, say, quick to take offence
- Bad-tempered — wearing sporty pants initially …
- Cantankerous agent drinking wine sent back
- Agent having imbibed drink, upset, bad-tempered
Buddy explains!

The straight part
We know that "quick to take offence" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case quick to take offence = stroppy.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 STROPPY mean?
STROPPY adjective- Ornery, fractious, belligerent, or obstreperous, and hence difficult to deal with.