Lines recited for instance in cathedral (5)
I believe the answer is:
elegy
'lines' is the definition.
(I've seen this before)
'for instance in cathedral' is the wordplay.
'for instance' becomes 'eg' (short for 'exempli gratia', 'for example' in Latin).
'in' indicates putting letters inside.
'cathedral' becomes 'ely' (cathedral city in Cambridgeshire).
'eg' inserted into 'ely' is 'ELEGY'.
'recited' acts as a link.
This may not be correct. It may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for elegy that I've seen before include "Poetic lament (in a country churchyard?)" , "lines of regret" , "that may be on the dead" , "Poem for the departed" , "Work by Gray?" .)