The most common and most likely answer to this crossword clue is the 4 plus 8 plus 3 plus 1 plus 7 letter word FOUR WEDDINGS AND A FUNERAL
I've seen this crossword clue in The Guardian
F
O
U
R
W
E
D
D
I
N
G
S
A
N
D
A
F
U
N
E
R
A
L
More clues leading to the result FOUR WEDDINGS AND A FUNERAL
Buddy explains!
The straight part
We know that "picture" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case picture = four weddings and a funeral.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.