Throw gently (4)
'throw gently' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for toss that I've seen before include "Fall from horse" , "Throw (coin) so as to choose" , "Throw carelessly" , "Chuck" , "Throw tt" .)
(Other definitions for lob that I've seen before include "Loft" , "high return" , "Fling" , "Send in a high arc as in tennis or cricket" , "Toss" .)