7d - Granadilla? Hand it over chopped in four (7,5)
I have - PASSION FRUIT ? if so, why chopped in four?
19a - Gathers flowers, say (6) I have - FLOCKS ?( FLOX)
24a - One incompetent fellow's missing from middle (4)
I have - U?I? ( UNIT ? )
7dn hand is pass ; anagram of "in four" with "it" around
24ac un(f)it and take away the f for fellow
19ac To say means to sound like for which you suggest phlox, but i'm not happy with that definition for gathers. What letters do you have ?