The most common and most likely answer to this crossword clue is the 8 letter word TALLY-HO
I've seen this crossword clue in The Times
T
A
L
L
Y
-
H
O
More clues leading to the result TALLY-HO
- Agree with head office quarry's been identified
- House on square? Let’s get it!
- Sporting cry from supporter wearing hot pants
- Huntsman’s cry produced by friend in front of this house
- Nevertheless, chum climbs into a four-in-hand
- Demanding cyclist cycles — call to get going
- Sporting call from friend in hot pants
- Call when riding, but interrupted by mate
- Cry on seeing a fox, but trapping friend
- Short talk on holy cross by a coach
Buddy explains!

The straight part
We know that "Let’s get it" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case let’s get it = tally-ho.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 TALLY-HO mean?
TALLY-HO noun- An instance of the interjection.
- A pleasure coach.
- To articulate the interjection.
- Used to urge on a fox hunt, especially when the fox is sighted.
- A simple greeting, exclusively used by the upper classes.
- Target sighted.