I.e. tunes forming a single unit (7)

I believe the answer is:

ensuite

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'a single unit' is the definition.
I know nothing about this answer so I can't tell whether it can be defined by this definition.

'i e tunes forming' is the wordplay.
'forming' is an anagram indicator.
'i'+'e'+'tunes'='ietunes'
'ietunes' anagrammed gives 'ENSUITE'.

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(Another definition for ensuite that I've seen is " type of bathroom".)

I've seen this clue in The Irish Independent.

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