Boyfriend not rocking? (6)

I believe the answer is:

steady

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This clue could be a double definition.

'boyfriend' is the first definition.
(I have seen 'Regular boyfriend' mean 'steady' so perhaps 'boyfriend' could also mean 'steady')

'not rocking?' is the second definition.
I know that 'rocking' relates to this answer.

Can you help me to learn more?

(Other definitions for steady that I've seen before include "Secure" , "Dependable; unmoving" , "Not wobbly" , "not easily shaken" , "Uniform" .)

I've seen this clue in The Guardian.

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