The most common and most likely answer to this crossword clue is the 4 plus 2 plus 5 letter word HAND ME DOWNS
I've seen this crossword clue in The Daily Telegraph
H
A
N
D
M
E
D
O
W
N
S
Buddy explains!

The straight part
We know that "second-hand clothes" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case second-hand clothes = hand me downs.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 HAND ME DOWNS mean?
HAND ME DOWNS noun- An item that is passed along for someone else to use; especially, a piece of clothing or other item which has been outgrown by an older sibling and passed down to a younger one.