Raise or double company's showy style (6)
I believe the answer is:
rococo
'showy style' is the definition.
'rococo' can be an answer for 'style' (I've seen this before). I am unsure of the 'showy' bit.
'raise or double company's' is the wordplay.
'raise' is a reversal indicator.
'double' shows that letters should be duplicated.
'company' becomes 'co' (abbreviation).
'or' backwards is 'ro'.
'co' doubled is 'coco'.
'ro'+'coco'='ROCOCO'
Can you help me to learn more?
(Other definitions for rococo that I've seen before include "Old style of ornamentation" , "Extravagant in style" , "Highly ornamented" , "Elaborate baroque style of ornamentation" , "Fanciful decoration" .)