The most common and most likely answer to this crossword clue is the 3 plus 4 letter word LOW GEAR
I've seen this crossword clue in The Times
L
O
W
G
E
A
R
More clues leading to the result LOW GEAR
- Perhaps first sound from farmyard machinery
- Miserable stuff that will get you going?
- Premiere of Whisky Galore! broadcast first or second
- Blue clothes first, perhaps?
- First or second moo-kit
- Poor clothing that’s selected for climbing
- First or second tragedy to enfold over Grace
- Sound of animal rage — in frenzy, this drives one uphill
- Cattle sound effects that may be useful when driving uphill
- Blue clothing? Nothing racy in this!
Buddy explains!

The straight part
We know that "Perhaps first" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case perhaps first = low gear.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.