Crossword Genius

The first steps on the road if too wobbly? (1,4,2,3,4)

Ross

I believe the answer is:

a foot in the door

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

'the first steps' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'on the road if too wobbly?' is the wordplay.
'wobbly?' indicates anagramming the letters (I've seen 'wobbly' mean this).
'on'+'the'+'road'+'if'+'too'='ontheroadiftoo'
'ontheroadiftoo' with letters rearranged gives 'A FOOT IN THE DOOR'.

Can you help me to learn more?

(Another definition for a foot in the door that I've seen is " a start?".)

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