Nominally a beginner in harp playing (5)

I believe the answer is:

ralph

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'nominally a' is the definition.
I can't judge whether this defines the answer.

'beginner in harp playing' is the wordplay.
'beginner' becomes 'l'.
'in' is an insertion indicator.
'playing' is an anagram indicator.
'harp' is an anagram of 'raph'.
'l' going inside 'raph' is 'RALPH'.

Can you help me to learn more?

(Other definitions for ralph that I've seen before include "Fellow's name" , "Piggy's friend (Lord of the Flies); --- Vaughan Williams" , "Man's name" , "American poet and essayist" , "--- Waldo Emerson, US writer" .)

I've seen this clue in the Evening Standard.

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