The most common and most likely answer to this crossword clue is the 9 letter word MODERNISE
I've seen this crossword clue in The Sunday Telegraph
M
O
D
E
R
N
I
S
E
More clues leading to the result MODERNISE
- Wise to protect head of state after defence department’s upgrade
- Fashion rebel introducing new change to be trendy
- Domineers, being out to introduce new ideas
- Renovate crumbling dome’s surface with resin, at last
- Do I seem upset about Royal Navy switch to new techniques?
- Update sermon I’d reworked twice in the end
Buddy explains!
The straight part
We know that "change to be trendy" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case change to be trendy = modernise.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 MODERNISE mean?
MODERNISE verb- To make (something old or outdated) up to date, or modern in style or function by adding or changing equipment, designs, etc.
- To become modern in appearance, or adopt modern ways