Moving stealthily, Diana's back with fish (7)

I believe the answer is:

sidling

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'moving' is the definition.
(sidling is a kind of moving)

'stealthily diana's back with fish' is the wordplay.
'stealthily' becomes 's' (this could be a standard abbreviation of which I'm unaware).
'diana' becomes 'Di' (Di is short for Diana).
'back' shows that the letters should be reversed in order.
'with' means one lot of letters go next to another.
'fish' becomes 'ling' (ling is a kind of fish).
'di' reversed gives 'id'.
's'+'id'+'ling'='SIDLING'

Can you help me to learn more?

(Other definitions for sidling that I've seen before include "Moving furtively" , "Prowling" .)

I've seen this clue in the Sydney Morning Herald.

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