The most common and most likely answer to this crossword clue is the 4 plus 4 letter word LONE WOLF
I've seen this crossword clue in The Guardian
L
O
N
E
W
O
L
F
More clues leading to the result LONE WOLF
- Reportedly, accommodation issue upset independent type
- Volatile fellow rounding on one preferring his own company
- No mixer – learner, individual needing smooth progress on way up
- No socialiser should be left with a womaniser
- Independent agent to provide author with advance we hear
- That’s funny, taking Owen back on board; fellow’s hardly a team player!
- Sub writer, reportedly a solitary type
- Solitary type, fellow struggling to carry on
- Lambert encounters an Austrian composer who has no close friends
- Fellow, one for the most part detached
Buddy explains!
The straight part
We know that "No socialiser" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case no socialiser = lone wolf.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.