The most common and most likely answer to this crossword clue is the 4 letter word ECHO
I've seen this crossword clue in The Times
E
C
H
O
More clues leading to the result ECHO
- Repeat part of speech occasionally
- Reverberation in City house
- Reverberant sound from the chorus
- A repeated noise from screech-owl
- Second of seeds chokes half-cut parrot
- Mounting appeal to Anglicans to reflect
- Parrot sheltered by screech-owls
- Foxtrot follows this contribution by fine choreographer
- The part of the choreography that precedes foxtrot
- Mirror in Quebec house
Buddy explains!

The straight part
We know that "to reflect" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case to reflect = echo.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 ECHO mean?
ECHO noun- A reflected sound that is heard again by its initial observer.
- An utterance repeating what has just been said.
- A device in verse in which a line ends with a word which recalls the sound of the last word of the preceding line.
- Sympathetic recognition; response; answer.
- The displaying on the command line of the command that has just been executed.
- The letter E in the ICAO spelling alphabet.
- (whist) A signal, played in the same manner as a trump signal, made by a player who holds four or more trumps (or, as played by some, exactly three trumps) and whose partner has led trumps or signalled for trumps.
- (whist) A signal showing the number held of a plain suit when a high card in that suit is led by one's partner.
- (of a sound or sound waves) To reflect off a surface and return.
- To reflect back (a sound).
- (by extension) To repeat (another's speech, opinion etc.).
- To repeat its input as input to some other device or system.
- (whist) To give the echo signal, informing one's partner about cards one holds.
- The visual image formed by an echocardiograph.
- The use of ultrasound to produce images of the heart.