The most common and most likely answer to this crossword clue is the 8 letter word DESIGNER
I've seen this crossword clue in The Times
D
E
S
I
G
N
E
R
More clues leading to the result DESIGNER
- Cancer, perhaps, in ruminant — one creating something new?
- Architect Mark does houses?
- Draughtsman’s gender is problematic
- Clothing stylist perhaps bucks including symbol
- Planner getting revised seeding right
- Referring to trendy wear of French person giving autograph?
- Creative type‘s gender is fluid
- Is gender affecting his plans?
- Stylist perhaps does without representation
- Creator does without hint
Buddy explains!

The straight part
We know that "Planner" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case planner = designer.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 DESIGNER mean?
DESIGNER noun- A person who designs something, or who designs things as a profession.
- A plotter or schemer.
- A software tool for designing things.
- Created by a designer, especially a fashion designer.