Investigator's right over cover of Bowie and Queen being Under Pressure (6)
I believe the answer is:
prober
'investigator's' is the definition.
(I've seen this in another clue)
'right over cover of bowie and queen being under pressure' is the wordplay.
'right over' becomes 'pro' (I can't justify this - if you can you should give a lot more credence to this answer).
'cover of' suggests removing the centre (only the letters which cover the word).
'and' means one lot of letters go next to another.
'queen' becomes 'r' (abbreviation for regina, e.g. in ER ).
'being under pressure' indicates an anagram (letters pressurised or manipulated).
'bowie' with its middle removed is 'be'.
'be' after 'r' is 'rbe'.
'rbe' with letters rearranged gives 'ber'.
'pro'+'ber'='PROBER'
Can you help me to learn more?
(Another definition for prober that I've seen is " investigator".)