The most common and most likely answer to this crossword clue is the 7 letter word NAFFEST
N
A
F
F
E
S
T
Buddy explains!
The straight part
We know that "least worthwhile" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case least worthwhile = naffest.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 NAFFEST mean?
NAFFEST adjective- In poor taste.
- Bad; tasteless.
- Poorly thought out, not workable, or otherwise not very good.
- Heterosexual.