The most common and most likely answer to this crossword clue is the 8 letter word SHEDLOAD
I've seen this crossword clue in The Daily Telegraph
S
H
E
D
L
O
A
D
More clues leading to the result SHEDLOAD
- A great many in Slough look extremely annoyed
- Dump consignment, large amount
- Abandoned boy admitting love for legion
- The girl would look and notice a large amount
- Lose cargo, large amount
- With look inside, madly dashed for great deal
- Has doled out great deal
- The girl would love to be hugged by boy a great deal
- Discharge cargo, a large amount
- The girl would look a day for such a large amount
Buddy explains!

The straight part
We know that "a great deal" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a great deal = shedload.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 SHEDLOAD mean?
SHEDLOAD noun- Shitload; a large amount.