Insect has moved inside like lightning (6)

I believe the answer is:

flashy

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'insect has moved inside like lightning' is the definition.
I can't judge whether this definition defines the answer.

'insect has moved inside' is the wordplay.
'insect' becomes 'fly' (fly is a kind of insect).
'moved' is an anagram indicator.
'inside' is an insertion indicator.
'has' is an anagram of 'ash'.
'fly' placed around 'ash' is 'FLASHY'.

Can you help me to learn more?

(Other definitions for flashy that I've seen before include "Showy but empty; Has fly (anag.)" , "Cheap and showy" , "Loud" , "Cheap and ostentatious" , "Gaudy or showy" .)

I've seen this clue in The Irish Independent.

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