The most common and most likely answer to this crossword clue is the 16 letter word CREASE-RESISTANT
I've seen this crossword clue in Financial Times
C
R
E
A
S
E
-
R
E
S
I
S
T
A
N
T
More clues leading to the result CREASE-RESISTANT
- Anti-wrinkle ointment mostly succeeded before tins sat abandoned
- Fantastic actresses earn it with few lines?
- Actresses retain potential – never getting wrinkles
- Staying smooth in scene, artists are dancing
- Since tears twice patched up, clothes so low maintenance?
- There is no pressing need for this material
Buddy explains!
The straight part
We know that "never getting wrinkles" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case never getting wrinkles = crease-resistant.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.