Rate show's opening with profound review (5)
I believe the answer is:
speed
'rate' is the definition.
(rate at which something is moving)
'show's opening with profound review' is the wordplay.
'show's opening' becomes 's' (I can't explain this - if you can you should give a lot more credence to this answer).
'with' says to put letters next to each other.
'profound' becomes 'deep' (synonyms).
'review' says the letters should be written backwards.
'deep' in reverse letter order is 'peed'.
's'+'peed'='SPEED'
Can you help me to learn more?
(Other definitions for speed that I've seen before include "Travel quickly" , "Rate of movement" , "make rapid progress" , "A devilish quick driver?" , "Race" .)