The most common and most likely answer to this crossword clue is the 11 letter word KLEPTOMANIA
I've seen this crossword clue in The Guardian
K
L
E
P
T
O
M
A
N
I
A
More clues leading to the result KLEPTOMANIA
- I plan to make changes, feeling compelled to take stock?
- Inability to stop taking offence
- Detained Arab outside Lima with a thievish nature
- Sadly like a top man's recurrent urge to steal
- Lifting problem?
- Weakness, when it comes to lifting a kilo, meant wimp finally collapsed
- Urge to lift top, like a terribly round fellow
Buddy explains!

The straight part
We know that "Weakness, when it comes to lifting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case weakness, when it comes to lifting = kleptomania.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 KLEPTOMANIA mean?
KLEPTOMANIA noun- A psychological disorder that causes an uncontrollable obsession with stealing without economic or material need.