Bachelor bound to outline hotel option (4,3)
I believe the answer is:
twin bed
'hotel option' is the definition.
(I've seen this in another clue)
'bachelor bound to outline' is the wordplay.
'bachelor' becomes 'B' (abbreviation e.g. BA=Bachelor of Arts).
'bound' is an insertion indicator.
'to outline' becomes 'twined' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'b' put within 'twined' is 'TWIN BED'.
Can you help me to learn more?
(Other definitions for twin bed that I've seen before include "This may be found in a double room" , "One of a pair to sleep on" , "One of a matching pair in a room for two" , "place for retirement" .)