The most common and most likely answer to this crossword clue is the 6 letter word WHOLES
W
H
O
L
E
S
Buddy explains!
The straight part
We know that "Complete items" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case complete items = wholes.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 WHOLES mean?
WHOLES noun- Something complete, without any parts missing.
- An entirety.