Sailing all over the place (2,3)
I believe the answer is:
at sea
I believe this clue is a double definition.
'sailing' is the first definition.
(synonyms)
'all over the place' is the second definition.
(I've seen this before)
(Other definitions for at sea that I've seen before include "Puzzled" , "Totally disorganised" , "Thrown" , "Voyaging" , "'Filled with bewilderment (2,3)'" .)