The most common and most likely answer to this crossword clue is the 7 letter word SPENDER
S
P
E
N
D
E
R
More clues leading to the result SPENDER
- Mailer securing stamp finally, one using money
- Poet, one who splashes out?
- Poet is writer held by revolutionary communists
- Waster, poet, communist
- Extravagant poet?
- Rebuffed sellers holding back buyer?
- Poet, one who is recklessly wasteful
- Poet commanding Queen to exhaust her Civil List?
- Profligate poet?
- Poet’s a consumer
Buddy explains!

The straight part
We know that "one using money" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one using money = spender.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.