The most common and most likely answer to this crossword clue is the 7 letter word CRAVING
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The straight part
We know that "Desire" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case desire = craving.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 CRAVING mean?
CRAVING noun- A strong desire; yearning.
- To desire strongly, so as to satisfy an appetite; to long or yearn for.
- To ask for earnestly; to beg; to claim.
- To call for; to require as a course of action.