Desire is seen in women's hearts (4)
I believe the answer is:
wish
'desire' is the definition.
(wish is a kind of desire)
'is seen in women's hearts' is the wordplay.
'seen in' is an insertion indicator.
'women' becomes 'w'.
'hearts' becomes 'h' (abbreviation used in card games e.g. bridge).
'w'+'h'='wh'
'is' going into 'wh' is 'WISH'.
(Other definitions for wish that I've seen before include "Desire, hope" , "Desire (to pull this bone?)" , "Express a desire (upon a star?)" , "Request - yen" , "prayer" .)