If Doppler is confused, put the highest ranking card in a prominent position (5,2,5)
I believe the answer is:
pride of place
'a prominent position' is the definition.
(things in pride of place are displayed prominently)
'if doppler is confused put the highest ranking card' is the wordplay.
'is confused' is an anagram indicator.
'put' is a charade indicator (letters next to each other).
'the highest ranking card' becomes 'ace' (I can't justify this - if you can you should believe this answer much more).
'if'+'doppler'='ifdoppler'
'ifdoppler' with letters rearranged gives 'prideofpl'.
'prideofpl'+'ace'='PRIDE OF PLACE'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for pride of place that I've seen before include "Patriotism" , "The best spot" , "Position of special prominence" , "Most prominent position" , "that the kings of beasts take?" .)