No experts in computer usage put in place (5)
I believe the answer is:
laity
'no experts in' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.
'computer usage put in place' is the wordplay.
'computer usage' becomes 'it' (I can't explain this - if you can you should give a lot more credence to this answer).
'put in' means one lot of letters goes inside another.
'place' becomes 'lay' (laying is a kind of placing).
'it' placed into 'lay' is 'LAITY'.
Can you help me to learn more?
(Other definitions for laity that I've seen before include "amateurs" , "Ordinary people" , "They're not the clergy" , "Non-experts" , "part of church" .)