The most common and most likely answer to this crossword clue is the 5 letter word MOIRÉ
M
O
I
R
Ă
‰
More clues leading to the result MOIRÉ
- Man turning up teaching bible material
- Setter affectedly touching fabric
- Type of silk Arab removed from wardrobe
- With a wavy pattern
- Watered port drunk up by Glow-worm
- Me poking fun at myself about wet appearance
- One clothed in extra material
- One is engrossed in additional material
- One wearing better fabric with wavy pattern
- It looks to have been wet, making love in the mud
Buddy explains!

The straight part
We know that "caused by way of working with heat (5)" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case caused by way of working with heat (5) = moirÉ.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 MOIRÉ mean?
MOIRÉ noun- Originally, a fine textile fabric made of the hair of an Asiatic goat.
- Any textile fabric to which a watered appearance is given.