Can't manoeuvre in uniform shape (11)
I believe the answer is:
rectangular
'can't manoeuvre in uniform shape' is the definition.
I can't tell whether this defines the answer.
'can't manoeuvre in uniform' is the wordplay.
'manoeuvre' indicates an anagram.
'in' means one lot of letters goes inside another.
'uniform' becomes 'regular' ('regular' can be similar in meaning to 'uniform').
'cant' with letters rearranged gives 'ctan'.
'ctan' inserted inside 'regular' is 'RECTANGULAR'.
Can you help me to learn more?
(Other definitions for rectangular that I've seen before include "form of comic strip?" , "flag, for example" , "to be at ninety degrees" , "Regal cat run (anag) - right-angled" , "A four-shaped, perhaps" .)