Fruitful time with royal in procession (7)

I believe the answer is:

fertile

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'fruitful' is the definition.
(associated in meaning)

'time with royal in procession' is the wordplay.
'time' becomes 't' (abbreviation).
'with' means one lot of letters go next to another.
'royal' becomes 'er' (abbreviation for Elizabeth Regina).
'in' is an insertion indicator.
'procession' becomes 'file' (I can't explain this - if you can you should give a lot more credence to this answer).
't' put after 'er' is 'ert'.
'ert' inserted into 'file' is 'FERTILE'.

Can you help me to learn more?

(Other definitions for fertile that I've seen before include "(Of soil) rich" , "Fecund" , "Rich in growth" , "Fructuous" , "Rich in resources" .)

I've seen this clue in The Sun.

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