The most common and most likely answer to this crossword clue is the 5 letter word SAUCE
I've seen this crossword clue in The Guardian
S
A
U
C
E
More clues leading to the result SAUCE
- Impudence that does for each of a pair of geese?
- Nerve of informant in speaking out
- Cause ground to dip
- Relish spring, reportedly
- Relish drink
- . Mouth is where some say river begins
- Relish brief accompaniment for cup
- Rudeness of reporter’s informant
- Impertinence one might get from a waiter
- Relish a piece of impudence
Buddy explains!

The straight part
We know that "Relish/drink" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relish/drink = sauce.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 SAUCE mean?
SAUCE noun- A liquid (often thickened) condiment or accompaniment to food.
- Tomato sauce (similar to US tomato ketchup), as in:
- (usually “the”) Alcohol, booze.
- Anabolic steroids.
- A soft crayon for use in stump drawing or in shading with the stump.
- Cheek; impertinence; backtalk; sass.
- (1800s) Vegetables.
- Any garden vegetables eaten with meat.
- To add sauce to; to season.
- To cause to relish anything, as if with a sauce; to tickle or gratify, as the palate; to please; to stimulate.
- To make poignant; to give zest, flavour or interest to; to set off; to vary and render attractive.
- To treat with bitter, pert, or tart language; to be impudent or saucy to.
- The person, place or thing from which something (information, goods, etc.) comes or is acquired.
- Spring; fountainhead; wellhead; any collection of water on or under the surface of the ground in which a stream originates.
- A reporter's informant.
- Source code.
- The name of one terminal of a field effect transistor (FET).