Detailed request to get men back using laboratory (2,5)
I believe the answer is:
in vitro
'back using laboratory' is the definition.
Both the answer and definition are adjectives. Perhaps you can see an association between them that I can't see?
'detailed request to get men' is the wordplay.
'detailed' means to remove the last letter (the word must be end-less or 'de-tailed').
'request' becomes 'invite' (invite is a kind of request).
'to get men' becomes 'ro' (I can't explain this - if you can you should give a lot more credence to this answer).
'invite' with its last letter removed is 'invit'.
'invit'+'ro'='IN VITRO'
Can you help me to learn more?
(Other definitions for in vitro that I've seen before include "- - fertilisation (IVF)" , "By test tube; under glass" , "Done in a test tube" , "Taking place in a test tube (Latin)" , "In an artificial environment outside the living organism (Latin)" .)