Tennyson was oddly detached about capture (7)
I believe the answer is:
ensnare
'capture' is the definition.
(ensnaring is a kind of capturing)
'tennyson was oddly detached' is the wordplay.
'oddly' indicates alternate letters (letters in the odd-numbered positions are used).
'detached' becomes 're' (I can't explain this - if you can you should believe this answer much more).
'tennyson'+'was'='tennysonwas'
The alternate letters of 'tennysonwas' are 'ensna'.
'ensna'+'re'='ENSNARE'
'about' acts as a link.
Can you help me to learn more?
(Other definitions for ensnare that I've seen before include "Catch as if in a trap or net" , "Ambush" , "Ecstatic expression of feeling" , "Capture, trap" .)