Harpey

[harpey]

Have tried this in Croswrord but with no useful results. 3d Express service unit. 3 letters -c- . I think ecu or ace not act but have no idea why it shoudl be either. Help

[Fibonacci]

ace - a fast well-placed serve in tennis.

[boxtops]

Ace - it's an unreturnable (express) fast service at tennis.

BTW - it helps if you put the name of the crossword in the title box, not your name... more people might answer then if they already have the crossword ;-)

[harpey]

Thanks - seemed to have forgotten tennis despite being a fan.