The most common and most likely answer to this crossword clue is the 3 letter word LET
L
E
T
More clues leading to the result LET
- Allow any number to ignore period of fasting
- Rent part of vaudeville theatre
- Ancient swindle definitely set up? Only partly
- Play them again, why don’t we!
- Lease back half of Swiss property?
- Allow John to start to investigate flies
- Bad service left expat gutted
- Lease at an end — relief!
- Allow this section of clues to become disappointments
- Drink needed after service failure bringing disappointment
Buddy explains!

The straight part
We know that "disappointments" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disappointments = let.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 LET mean?
LET noun- The allowing of possession of a property etc. in exchange for rent.
- To allow to, not to prevent (+ infinitive, but usually without to).
- To leave.
- To allow the release of (a fluid).
- To allow possession of (a property etc.) in exchange for rent.
- To give, grant, or assign, as a work, privilege, or contract; often with out.
- Used to introduce an imperative in the first or third person.
- To cause (+ bare infinitive).
- To hinder, prevent, impede, hamper, cumber; to obstruct (someone or something).
- To prevent someone from doing something; also to prevent something from happening.
- To tarry or delay.
- To allow to, not to prevent (+ infinitive, but usually without to).
- To leave.
- To allow the release of (a fluid).
- To allow possession of (a property etc.) in exchange for rent.
- To give, grant, or assign, as a work, privilege, or contract; often with out.
- Used to introduce an imperative in the first or third person.
- To cause (+ bare infinitive).
- An obstacle or hindrance.
- The hindrance caused by the net during serve, only if the ball falls legally.
- To hinder, prevent, impede, hamper, cumber; to obstruct (someone or something).
- To prevent someone from doing something; also to prevent something from happening.
- To tarry or delay.