The most common and most likely answer to this crossword clue is the 7 plus 3 letter word CRICKET BAT
I've seen this crossword clue in The Guardian
C
R
I
C
K
E
T
B
A
T
More clues leading to the result CRICKET BAT
- Occasional driver taking two animals
- Two animals, one taken to the middle
- Sports club
- Mammal after insect, one of these oiled
- One used for hitting creature that flies under hopper
- Two animals — requirement for four or six, perhaps?
- Two animals in willow on the field?
- Two members of our Kingdom joining sports club
- 14 Insect, flier or leather hunter?
- Striker at Old Trafford needs two contrasting wingers
Buddy explains!
The straight part
We know that "that striker uses when dispatching deliveries" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case that striker uses when dispatching deliveries = cricket bat.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.