The most common and most likely answer to this crossword clue is the 8 letter word POSTCODE
I've seen this crossword clue in The Sunday Telegraph
P
O
S
T
C
O
D
E
More clues leading to the result POSTCODE
Buddy explains!
The straight part
We know that "that helps with deliveries" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that helps with deliveries = postcode.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 POSTCODE mean?
POSTCODE noun- A sequence of letters and numbers added to a postal address to aid the sorting and delivery of post / mail.
- (by extension) The region denoted by a postcode.
- To give a postcode to; to mark with a postcode.