The most common and most likely answer to this crossword clue is the 7 letter word STIPEND
I've seen this crossword clue in The Guardian
S
T
I
P
E
N
D
More clues leading to the result STIPEND
- Regular payment and extra money in post?
- Fixed allowance and gratuity in post
- Transmit clue hidden inside for a small fee
- Pay saint very little money to conclude
- Salary? Mine must be returned in post!
- Spend it recklessly?
- Gratuity in post used as wage
- Retiring, it’s start of pension with what counts as final salary
- Allowance arranged? Spend it!
- Wages and gratuity in post
Buddy explains!

The straight part
We know that "Spend it recklessly?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case spend it recklessly? = stipend.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 STIPEND mean?
STIPEND noun- A scholarship granted to a student.
- A fixed payment, generally small and occurring at regular intervals; a modest allowance.
- To provide (someone) with a stipend.