The most common and most likely answer to this crossword clue is the 7 plus 8 letter word FASHION DESIGNER
I've seen this crossword clue in The Sunday Telegraph
F
A
S
H
I
O
N
D
E
S
I
G
N
E
R
Buddy explains!
The straight part
We know that "Dressmaker perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dressmaker perhaps = fashion 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.