The most common and most likely answer to this crossword clue is the 5 letter word TUTUS
T
U
T
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More clues leading to the result TUTUS
Buddy explains!

The straight part
We know that "NZ shrubs" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case nz shrubs = tutus.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 TUTUS mean?
TUTUS noun- A ballet skirt made of layered stiff but light netting.
- Any of the genus Coriaria of shrubs and trees found in New Zealand.