The most common and most likely answer to this crossword clue is the 5 letter word TOADY
I've seen this crossword clue in The Guardian
T
O
A
D
Y
More clues leading to the result TOADY
- Currently Democrat’s moving to the right. Such a creep!
- He grovels now as duke is coming down
- Sycophant now putting article higher
- Jenkins making sport with insertion of plug
- Creep like an amphibian?
- Miniature bears puff and creep
- A duke entertained by model, a sycophant
- Notice, in play, fawn
- Now, daughter’s advancing to crawl
- Bill featuring in play, sycophant
Buddy explains!

The straight part
We know that "creep" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case creep = toady.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 TOADY mean?
TOADY noun- A sycophant who flatters others to gain personal advantage or an obsequious lackey or minion
- A coarse, rustic woman.
- (construed with to) To behave like a toady (to someone).
- Toadlike