Noticeable space (3)
I believe the answer is:
gap
'noticeable space' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gap that I've seen before include "Interval, space" , "prospective students may enjoy this year?" , "Fissure" , "Break in continuity" , "Breach or lacuna" .)