The most common and most likely answer to this crossword clue is the 7 letter word SCENERY
I've seen this crossword clue in The Daily Telegraph
S
C
E
N
E
R
Y
More clues leading to the result SCENERY
- Set lines at end of episode
- View endless track followed by European railway
- Something chewable, in terms of ham?
- Screen wild unknown landscape
- Unseemly exchange by railway is quite a sight
- Flats arranged for the cast
- English railway following endless trail for sightseer’s target?
- It’s found behind actors — dramatic landscape drawn large for play
- Landscape flats
- It’s what’s behind ham aroma mainly found on Eastern Railway
Buddy explains!

The straight part
We know that "It’s what’s behind ham" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s what’s behind ham = scenery.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 SCENERY mean?
SCENERY noun- View, natural features, landscape.
- Stage backdrops, property and other items on a stage that give the impression of the location of the scene.