Turns sickly-looking in fencing (5)
I believe the answer is:
pales
'turns' is the definition.
The answer and definition can be both related to bodily activities as well as being verbs in their -s form.
Maybe you can see a link between them that I can't see?
'sickly-looking in fencing' is the wordplay.
'sickly' becomes 'pale' (I've seen this in another clue).
'looking in fencing' becomes 's' (I can't justify this - if you can you should give a lot more credence to this answer).
'pale'+'s'='PALES'
Can you help me to learn more?
(Other definitions for pales that I've seen before include "Goes white in leaps" , "Goes white, loses colour" .)
