"Not only that . . ." (4)
'not only that' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for also that I've seen before include "Likewise" , "revolutionary a part for Yugoslavia" , "Plus" , "in accompaniment" , "Item" .)
'not only that' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for and that I've seen before include "& 18 You bet!" , "Most-used conjunction in English" , "Together with" , "A very common conjunction" , "it needs wholly positive input for positive result" .)