The most common and most likely answer to this crossword clue is the 9 letter word DOOHICKEY
D
O
O
H
I
C
K
E
Y
Buddy explains!
The straight part
We know that "gadget" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case gadget = doohickey.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 DOOHICKEY mean?
DOOHICKEY noun- A thing (used in a vague way to refer to something whose name one cannot recall)