Tommy will be in it all the same (7)
I believe the answer is:
uniform
'all the same' is the definition.
(I've seen this before)
'tommy will be in it' is the wordplay.
I cannot really see how this works, but
'be' could be 'form' (forming is a kind of being) and 'form' is found in the answer.
The remaining letters 'uni' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for uniform that I've seen before include "Official wear; unvarying" , "reluctant pupils may be forced to wear it" , "Official attire" , "Distinctive outfit" , "The clothing is always the same," .)