Glove female relative left in pocket (8)
I believe the answer is:
gauntlet
'glove' is the definition.
(I know that gauntlet is a type of glove)
'female relative left in pocket' is the wordplay.
'female relative' becomes 'aunt' (I've seen this before).
'left' becomes 'l' (common abbreviation).
'in' indicates putting letters inside.
'pocket' becomes 'get' (I can't justify this - if you can you should believe this answer much more).
'aunt'+'l'='auntl'
'auntl' going into 'get' is 'GAUNTLET'.
Can you help me to learn more?
(Other definitions for gauntlet that I've seen before include "What might represent a challenge" , "Glove with long sleeve, thrown down challenge" , "It may be thrown down or run" , "Stout glove" , "that may be punishing for runner" .)