Rang the bell as instructed, say (6)
I believe the answer is:
tolled
'rang the bell' is the definition.
'tolled' can be an answer for 'rang' (tolling is a kind of ringing). I am unsure of the 'the bell' bit.
'instructed say' is the wordplay.
'instructed' becomes 'told' (I've seen this before).
'say' shows a homophone (sound like).
'told' sounds like 'TOLLED'.
'as' is the link.
Can you help me to learn more?
(Other definitions for tolled that I've seen before include "Of bell, rang solemnly" , "Of bell, rang with slow strokes" , "Of bell, rang sonorously" , "Sounded the bell" , "Rang, or charged for using" .)