Ostentatious show dog pursued by coppers (4)

I believe the answer is:

pomp

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'ostentatious show' is the definition.
'pomp' can be an answer for 'show' (I've seen this in another clue). I'm unsure of the 'ostentatious' bit.

'dog pursued by coppers' is the wordplay.
'dog' becomes 'pom' (short for Pomeranian).
'pursued by' means one lot of letters go next to another.
'coppers' becomes 'p'.
'pom'+'p'='POMP'

Can you help me to learn more?

(Other definitions for pomp that I've seen before include "Great show" , "Ceremonial grandeur" , "Grandiosity" , "Vain display" , "Ceremoniousness" .)

I've seen this clue in the Evening Standard.

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