The most common and most likely answer to this crossword clue is the 5 letter word ROGER
I've seen this crossword clue in The Times
R
O
G
E
R
More clues leading to the result ROGER
- Man I have heard on the radio
- Raving person has love for a man in broadcast message
- I hear you pulled up some more gorse
- I received your message, man
- Jolly man? Got it!
- I will run: about to proceed uphill
- Turn right round, and the queen's got it
- Message received, man!
- Turn up with king and queen, received and understood
- Backing barely one of 16 popes will do
Buddy explains!

The straight part
We know that "I hear you" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case i hear you = roger.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 ROGER mean?
ROGER interjection- (radio telecommunications) Received (used in radio communications to acknowledge that a message has been received and understood)
- Of a man, to have sexual intercourse with (someone), especially in a rough manner.
- To have sexual intercourse.