The most common and most likely answer to this crossword clue is the 8 letter word UNSALTED
I've seen this crossword clue in The Guardian
U
N
S
A
L
T
E
D
Buddy explains!

The straight part
We know that "with no particular relish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case with no particular relish = unsalted.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 UNSALTED mean?
UNSALTED adjective- To which salt has not been added.
- Without a cryptographic salt.