Person bathing pets ensures dog at the end has space to make about-turn (7)

'person bathing' is the definition.
The definition suggests a singular noun which matches the answer.

'pets ensures dog at the end has space to make about-turn' is the wordplay.
I cannot quite understand how this works, but
'space' could be 'room' (enough space or room to do something) and 'room' is found within the answer.
The remaining letters 'ger' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?