Was fast listener held transfixed? (7)
I believe the answer is:
speared
'transfixed?' is the definition.
(spearing is a kind of transfixing)
'was fast listener held' is the wordplay.
'was fast' becomes 'sped' (I can't justify this - if you can you should believe this answer much more).
'listener' becomes 'ear' (body part which hears or listens).
'held' indicates putting letters inside.
'sped' enclosing 'ear' is 'SPEARED'.
Can you help me to learn more?
(Another definition for speared that I've seen is " hit by javelin maybe!".)