Crossword Genius

Service the writer has for street gang? (7)

Ross

I believe the answer is:

massive

I'm a little stuck... Click here to teach me more about this clue!

'service the writer has for street gang?' is the definition.
I can't tell whether this defines the answer.

'service the writer has for street' is the wordplay.
'service' becomes 'mass' (kind of church service).
'the writer' becomes 'I' (the person who is writing these clues).
'has' is a charade indicator (letters next to each other).
'for street' becomes 've' (I am not sure about this - if you are sure you should believe this answer much more).
'mass'+'i'+'ve'='MASSIVE'

Can you help me to learn more?

(Other definitions for massive that I've seen before include "Not wavering" , "Enormous" , "Colossal" , "Great" , "Monolithic, huge" .)

I've seen this clue in The Sun.
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