The most common and most likely answer to this crossword clue is the 13 letter word THUMB-INDEXED
I've seen this crossword clue in The Times
T
H
U
M
B
-
I
N
D
E
X
E
D
Buddy explains!
The straight part
We know that "As dictionary perhaps/facilitating digital access" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case as dictionary perhaps/facilitating digital access = thumb-indexed.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.