The most common and most likely answer to this crossword clue is the 8 letter word FORETOPS
I've seen this crossword clue in The Daily Telegraph
F
O
R
E
T
O
P
S
Buddy explains!
The straight part
We know that "Platforms" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case platforms = foretops.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 FORETOPS mean?
FORETOPS noun- The top of the head; the top of the forehead.
- The lock of hair which grows on top of the forehead; the corresponding part of a wig.
- In the phrase, to take time (or occasion or opportunity) by the foretop, meaning "to boldly seize an opportunity".
- A fop; one who sports a foretop.
- An erect tuft of hair.
- The forelock of a horse.
- A platform at the top of the foremast, supported by the trestle trees.
- The front seat at the top of a horse-drawn vehicle.