Craftsmen increasingly important in small spaces (9)

I believe the answer is:

engravers

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'craftsmen' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe they are linked in a way I don't understand?

'increasingly important in small spaces' is the wordplay.
'increasingly important' becomes 'graver' (I can't justify this - if you can you should believe this answer much more).
'in' means one lot of letters goes inside another.
'small spaces' becomes 'ens' (I've seen this in another clue).
'graver' placed inside 'ens' is 'ENGRAVERS'.

Can you help me to learn more?

(Another definition for engravers that I've seen is " They impress".)

I've seen this clue in The Times.

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