Ostensibly where to put a watch's hands (2,3,4,2,2)
I believe the answer is:
on the face of it
'ostensibly' is the definition.
(synonyms)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for on the face of it that I've seen before include "Ostensibly (2,3,4,2,2)" , "where are the chronometer's hands?" , "how a clock is read?" , "you can find a clock's numbers here" , "as it would appear" .)