Female expert gets ready to leave external applications (4,5)
I believe the answer is:
face packs
'external applications' is the definition.
The answer and definition can be both man-made objects as well as being plural nouns.
Maybe you can see an association between them that I don't see?
'female expert gets ready to' is the wordplay.
'female' becomes 'f' (abbreviation).
'expert' becomes 'ace' (ace can informally mean very good).
'gets' means one lot of letters go next to another.
'ready to' becomes 'packs' (I can't explain this - if you can you should give a lot more credence to this answer).
'f'+'ace'+'packs'='FACE PACKS'
'leave' is the link.
Can you help me to learn more?
(Another definition for face packs that I've seen is " Cosmetics".)