The most common and most likely answer to this crossword clue is the 11 letter word EXPLORATION
I've seen this crossword clue in The Guardian
E
X
P
L
O
R
A
T
I
O
N
More clues leading to the result EXPLORATION
Buddy explains!
The straight part
We know that "research" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case research = exploration.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 EXPLORATION mean?
EXPLORATION noun- The process of exploring.
- The process of penetrating, or ranging over for purposes of (especially geographical) discovery.
- The (pre-)mining process of finding and determining commercially viable ore deposits (after prospecting), also called mineral exploration.
- A physical examination of a patient.