Reticent about skin growth that's looking dark (7)
I believe the answer is:
swarthy
'looking dark' is the definition.
'swarthy' can be an answer for 'dark' (I've seen this before). I'm unsure of the 'looking' bit.
'reticent about skin growth' is the wordplay.
'reticent' becomes 'shy' (both can mean withdrawn or timid).
'about' indicates putting letters inside.
'skin growth' becomes 'wart' (I've seen this in another clue).
'shy' enclosing 'wart' is 'SWARTHY'.
'that's' is the link.
Can you help me to learn more?
(Other definitions for swarthy that I've seen before include "Dark complexioned" , "Dark-complexioned" , "Dark skin" , "Having a dark complexion" , "Dark-skinned" .)