The most common and most likely answer to this crossword clue is the 7 letter word LOITERS
I've seen this crossword clue in The Daily Telegraph
L
O
I
T
E
R
S
More clues leading to the result LOITERS
- Its role is to reform lags?
- Hangs around spreading rotten lies putting cardinal down
- See one taking rest – unfortunately doesn’t get on with it
- Labour leader, joining Tories after a reshuffle, acts suspiciously
- Signs of hesitation after one in bunch dilly-dallies
- Labour leader facing confused Tories hangs around
- Loser desperate to have sex is wandering aimlessly
- One amongst many blunders! Abandons Syria essentially and waits idly
- Delays certain measures including closing of Metro
- American measures to imprison old lags
Buddy explains!

The straight part
We know that "lags" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case lags = loiters.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 LOITERS mean?
LOITERS verb- To stand about without any aim or purpose; to stand about idly.
- To remain at a certain place instead of moving on.
- For an aircraft to remain in the air near a target.