The most common and most likely answer to this crossword clue is the 7 letter word PIECING
P
I
E
C
I
N
G
Buddy explains!
The straight part
We know that "Combining" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case combining = piecing.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 PIECING mean?
PIECING verb- (usually with together) To assemble (something real or figurative).
- To make, enlarge, or repair, by the addition of a piece or pieces; to patch; often with out.
- To produce a work of graffiti more complex than a tag.
- A patch.