Consider fitted WHAM! jacket left in the box as highly desirable (4-4)
I believe the answer is:
must-have
If this is the answer, I'm afraid I cannot explain it.
Can you help me to learn more?
(Other definitions for must-have that I've seen before include "Essential" , "Highly desirable item" .)
I've seen this clue in the Sydney Morning Herald.
Want a hint initially instead of a full solution?
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