Crossword Genius

Urge one to join Liberal Party (6)

Ross

I believe the answer is:

libido

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

'urge' is the definition.
(I've seen this before)

'one to join liberal party' is the wordplay.
'one to join' means one lot of letters go next to another.
'liberal' becomes 'lib'.
'party' becomes 'ido' (I can't explain this - if you can you should believe this answer much more).
'lib'+'ido' is 'LIBIDO'.

Can you help me to learn more?

(Other definitions for libido that I've seen before include "Freud's sex drive" , "Instinctive desire" , "Life force" , "Vital urge" , "Emotional craving" .)

I've seen this clue in The Times.
Want a hint initially instead of a full solution? Install my app