Somewhat spherical woman (5)
I believe the answer is:
erica
'woman' is the definition.
'somewhat spherical' is the wordplay.
'somewhat' indicates the answer is hidden within the clue.
'ERICA' is hidden in the letters of 'spherical'.
(Other definitions for erica that I've seen before include "growing up on the moors" , "Shrub genus; girl's name" , "Woman" , "Girl - heather" , "Heather's Latin name?" .)