The most common and most likely answer to this crossword clue is the 2 plus 8 letter word MY PLEASURE
I've seen this crossword clue in The Guardian
M
Y
P
L
E
A
S
U
R
E
More clues leading to the result MY PLEASURE
Buddy explains!
The straight part
We know that "What do I find sensually gratifying/Don’t mention it" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what do i find sensually gratifying/don’t mention it = my pleasure.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.