Postgraduate guest pulled out innovative device, capable of connecting apparatus (7)
I believe the answer is:
adaptor
'device capable of connecting apparatus' is the definition.
I can't tell whether this definition defines the answer.
'postgraduate guest pulled out innovative' is the wordplay.
'pulled out' is a deletion indicator.
'innovative' is an anagram indicator.
'postgraduate' with 'guest' removed is 'poradat'.
'poradat' with letters rearranged gives 'ADAPTOR'.
Can you help me to learn more?
(Other definitions for adaptor that I've seen before include "It enables fit" , "Device that enables more than one plug per socket" , "Kind of electric plug" , "Electrical convertor" , "Connector (O, not E)" .)