The most common and most likely answer to this crossword clue is the 7 letter word MEATIER
I've seen this crossword clue in The Guardian
M
E
A
T
I
E
R
Buddy explains!
The straight part
We know that "carrying more weight" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case carrying more weight = meatier.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 MEATIER mean?
MEATIER adjective- Of, relating to, or containing meat.
- Resembling meat in flavour, etc.
- Of a person or a body part, large and solid.
- Substantial.