Son and another boy, summer visitor (4,6)

I believe the answer is:

sand martin

'summer visitor' is the definition.

'son and another boy' is the wordplay.
'son' becomes 's'.
'another boy' becomes 'martin' (I am not sure about the 'another' bit.**).
's'+'and'+'martin'='SAND-MARTIN'

(Other definitions for sand martin that I've seen before include "Migratory bird" , "Flyer" , "Singer" .)

I've seen this clue in The Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.