Engage in book touching on universe’s centre? (7)
I believe the answer is:
involve
'engage' is the definition.
(I know that involve is a more specific form of the action engage)
'in book touching on universe's centre?' is the wordplay.
'book touching on' becomes 'vol' (I can't explain this - if you can you should give a lot more credence to this answer).
'centre?' indicates the central letters (I've seen 'centre of' mean this).
The middle of 'universe' is 've'.
'in'+'vol'+'ve'='INVOLVE'
Can you help me to learn more?
(Other definitions for involve that I've seen before include "Cause to share in" , "Contain; envelop" , "Entail" , "Engage as a participant" , "Rope in" .)