Versatile player getting drug into GCHQ in a tracksuit, somehow (5-6,6)

I believe the answer is:

quick-change artist

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'versatile player getting drug into gchq in a tracksuit somehow' is the definition.
I can't tell whether this defines the answer.

'drug into gchq in a tracksuit somehow' is the wordplay.
'drug' becomes 'e' (E is another name for ecstasy).
'into' means one lot of letters goes inside another.
'somehow' is an anagram indicator.
'gchq'+'in'+'a'+'tracksuit'='gchqinatracksuit'
'gchqinatracksuit' with letters rearranged gives 'quickchangartist'.
'e' put inside 'quickchangartist' is 'QUICK-CHANGE ARTIST'.

Can you help me to learn more?

I've seen this clue in The Times.

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