The most common and most likely answer to this crossword clue is the 8 letter word LAVISHES
I've seen this crossword clue in The Times
L
A
V
I
S
H
E
S
More clues leading to the result LAVISHES
Buddy explains!
The straight part
We know that "Heaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case heaps = lavishes.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 LAVISHES mean?
LAVISHES verb- To give out extremely generously; to squander.
- To give out to (somebody) extremely generously.