The most common and most likely answer to this crossword clue is the 7 letter word MOORAGE
I've seen this crossword clue in The Guardian
M
O
O
R
A
G
E
More clues leading to the result MOORAGE
- Charge levied by the bank that suggests mad cow disease?
- Where boat stops, beastly noise is coming with anger
- For example, a space to the north where a boat may berth
- Barren spot – it takes time to establish a firm connection
- Money to tie up, fell over time
- Heath needed time to make the berth
- Cost of anchoring boats creating anger in Cowes, we’re told?
- Charge for leaving boat a short time or much longer?
- Fee for securing boat — what might make lower charge?
- Berth in sound by Jersey or Guernsey before storm
Buddy explains!

The straight part
We know that "where a boat may berth" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case where a boat may berth = moorage.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 MOORAGE mean?
MOORAGE noun- The act of mooring.
- A place where a ship or an aircraft may be moored.
- The fee for mooring.