Merely (4)
'merely' is the definition.
(synonyms)
This is all the clue.
(Other definitions for only that I've seen before include "See 6" , "Merely; single" , ". . . . the Lonely (sung by Roy Orbison)" , "Existing alone with no other, perhaps a child" , "Siblingless (child)" .)
'merely' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for just that I've seen before include "Fair - precisely" , "By the skin of your teeth - equitable" , "Fair; a moment ago" , "And nothing more" , "Barely; right and fair" .)
'merely' is the definition.
(synonyms)
This is all the clue.
(Other definitions for simply that I've seen before include "Without fuss" , "In a straightforward manner" , "Merely, just" .)