Bewli-Begto raises a valid point, but it applies to all users, controllers included. Some years ago on descent from the north for LGW, we were "cleared Willow". As an infrequent visitor, it was not immediately clear that this meant "cleared for the Willow Arrival", and not "direct Willow". There was a difference!
Abbreviations are fine, but the instigator must ensure they are unambiguous. If you remember flight engineers (not systems operators), you will also remember that "take off power" was a no-no.