The most common and most likely answer to this crossword clue is the 7 letter word TWINSET
I've seen this crossword clue in The Daily Telegraph
T
W
I
N
S
E
T
More clues leading to the result TWINSET
- Three card players in silly feminine attire
- Film following Jedward, say, in women’s clothing
- Accompaniment for pearls? Swine, confused, ejects centre of that
- Check up about secure co-ordinating gear
- Outfit isn’t wet, surprisingly
- One of the Krays perhaps fixed something to wear
- Matching clothing, it’s new possibly on first of toddlers
- Fool assuming North, South and East may make co-ordinates
- Clothing initially tight, actress wanting large
- Clown catches nose removing old clothes
Buddy explains!

The straight part
We know that "Outfit" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outfit = twinset.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 TWINSET mean?
TWINSET noun- A combination of a cardigan and a jumper, usually knitted in wool or cashmere.
- A pair of cars or locomotives that are permanently coupled and treated as a single unit.
- A pair of cylinders containing air for the diver to breathe.