Monitor female relative in way still (8)
I believe the answer is:
stagnant
'still' is the definition.
('stagnant' can be a synonym of 'still')
'monitor female relative in way' is the wordplay.
'monitor' becomes 'tag' (electronic tag).
'female relative' becomes 'nan'.
'in' is an insertion indicator.
'way' becomes 'st' (**).
'tag'+'nan'='tagnan'
'tagnan' put within 'st' is 'STAGNANT'.
(Other definitions for stagnant that I've seen before include "Sluggish" , "Not circulating or flowing" , "making no progress" , "Showing little activity" , "Brackish and foul" .)