The most common and most likely answer to this crossword clue is the 5 letter word TEACH
I've seen this crossword clue in The Guardian
T
E
A
C
H
More clues leading to the result TEACH
- Instruct apprentice, initially in college
- Tutor originally active in college
- Cyclist's close with a head coach
- Celebrate a champion’s attributes for school
- Pirate school
- School certificate achieved? Not entirely
- Train tickets over 85% off per person
- Give lessons in corporate achievement
- Pirate show
- Model of car and every train
Buddy explains!

The straight part
We know that "Give lessons" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case give lessons = teach.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 TEACH mean?
TEACH verb- To show (someone) the way; to guide, conduct; to point, indicate.
- (ditransitive) To pass on knowledge to.
- To pass on knowledge, especially as one's profession; to act as a teacher.
- (ditransitive) To cause to learn or understand.
- (ditransitive) To cause to know the disagreeable consequences of some action.
- (usually as a term of address) teacher