The most common and most likely answer to this crossword clue is the 7 letter word SINUATE
I've seen this crossword clue in The Daily Telegraph
S
I
N
U
A
T
E
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 SINUATE mean?
SINUATE verb- To advance in wavy or curvy manner, to bend, to curve, to wind in and out
- Sinuous
- Having wavy indentation on its border or edge.
- (of gills) Roughly the same height for most of its length, becoming much shallower and then curving back towards the stem before reaching the attachment point.