Wanderer involved in dodgy psychology (5)

I believe the answer is:

gypsy

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

'wanderer' is the definition.
The definition and answer can be both people as well as being singular nouns.
Maybe there's an association between them I don't understand?

'involved in dodgy psychology' is the wordplay.
'involved in' indicates a hidden word.
'GYPSY' can be found hidden inside 'dodgy psychology'.

Can you help me to learn more?

(Other definitions for gypsy that I've seen before include "old Broadway play" , "Traveller" , "Member of a normadic people" , "Romany" .)

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

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