The most common and most likely answer to this crossword clue is the 13 letter word PROCRASTINATE
I've seen this crossword clue in The Times
P
R
O
C
R
A
S
T
I
N
A
T
E
More clues leading to the result PROCRASTINATE
- Carton rep showed off round wine stall
- Spectator upset with rain delay
- Put off edited satanic report
- Stall for box holding a small container
- Talk foolishly about cast-iron resolve causing delay
- Delay at Nice airport’s putting one out awfully
- Wonky taps in reactor cause delay
- Drag one’s feet on stair carpet that’s laid out
- Put off due to rain, spectator moved
- Aspire to act, failing with realisation in the end? That’s about right
Buddy explains!

The straight part
We know that "Put off" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case put off = procrastinate.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 PROCRASTINATE mean?
PROCRASTINATE verb- To delay taking action; to wait until later.
- To put off; to delay (something).