The most common and most likely answer to this crossword clue is the 10 letter word MONOCHROME
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More clues leading to the result MONOCHROME
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 = monochrome.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 MONOCHROME mean?
MONOCHROME noun- A black and white image, especially such a photograph.
- A painting executed in shades of a single colour.
- A ceramic glaze of a single colour; an object so glazed.
- Having only one colour.
- Representing colours with shades of gray.