The most common and most likely answer to this crossword clue is the 5 plus 4 letter word GOING RATE
I've seen this crossword clue in The Guardian
G
O
I
N
G
R
A
T
E
More clues leading to the result GOING RATE
- Prevailing price to enter peeve
- What home fuel will do? What’s the normal price?
- Get outta here! One doesn’t appreciate what it costs
- One refusing to give thanks after energy comes to current price
- Prevailing price to enter? Considerable, it’s said
- What house coal will do for the usual price
- Enter opening to grab right price normally
- What it usually costs to leave thankless wretch
Buddy explains!

The straight part
We know that "what it costs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what it costs = going rate.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.