Lamb's tender (8)
I believe the answer is:
innocent
I believe this clue is a double definition.
'lamb's' is the first definition.
(thesaurus)
'tender' is the second definition.
(thesaurus)
(Other definitions for innocent that I've seen before include "Artless or guiltless" , "Harmless or guiltless" , "Without sin" , "Virgin" , "Guiltless or guileless" .)