Singer revealed by body language to some extent (5)
I believe the answer is:
dylan
'singer' is the definition.
(I know that Dylan is a singer)
'by body language to some extent' is the wordplay.
'to some extent' says the answer is hidden in the clue.
'DYLAN' is hidden within 'by body language'.
'revealed' acts as a link.
(Other definitions for dylan that I've seen before include "Bob -, Blowin' in the Wind singer" , "Bob (singer) - Thomas (author)" , "Bob --, Nobel prize winner" , "Popular musician" , "American singer-songwriter Bob, b. 1941" .)