The most common and most likely answer to this crossword clue is the 6 letter word GUSSET
I've seen this crossword clue in The Guardian
G
U
S
S
E
T
More clues leading to the result GUSSET
- Good American group making strengthener for garment
- Group of Americans after good supporter
- Angry Central American group provides material reinforcement
- Piece of material for reinforcing some skirts in the wind
- News withheld from hired killers, sent some mail
- Suggest leaving end of webbing out of panel strengthening garment
Buddy explains!

The straight part
We know that "material reinforcement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case material reinforcement = gusset.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 GUSSET mean?
GUSSET noun- A small piece of cloth inserted in a garment, for the purpose of strengthening some part or giving it a tapering enlargement cf. godet.
- A small piece of mail, providing some protection where two plates of armor are joined, usually at the elbows, under the shoulders, and behind the knees.
- (machinery) A kind of bracket, or angular piece of iron, fastened in the angles of a structure to give strength or stiffness; especially, the part joining the barrel and the fire box of a locomotive boiler.
- An abatement or mark of dishonor in a coat of arms, resembling a gusset.
- (roofing) A large flat metal piece wider than the valley to help prevent build-up at the base of the valley, either from debris or ice dam formations.
- To make with a gusset; to sew a gusset into.