The most common and most likely answer to this crossword clue is the 1 plus 7 plus 5 plus 7 plus 2 plus 4 letter word A ROLLING STONE GATHERS NO MOSS
I've seen this crossword clue in The Guardian
A
R
O
L
L
I
N
G
S
T
O
N
E
G
A
T
H
E
R
S
N
O
M
O
S
S
More clues leading to the result A ROLLING STONE GATHERS NO MOSS
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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.