The most common and most likely answer to this crossword clue is the 7 letter word DELIGHT
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More clues leading to the result DELIGHT
Buddy explains!

The straight part
We know that "relish" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case relish = delight.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 DELIGHT mean?
DELIGHT noun- Joy; pleasure.
- Something that gives great joy or pleasure.
- To give delight to; to affect with great pleasure; to please highly.
- To have or take great pleasure.