Help please parsing these...
16d. Very masculine Scotsman is not often seen (8) - UNCOMMON (Not often seen)
I thought 'Very masculine' might be MM, but that's about it.
27a. Having open exhibition initially, secure honours - or pass? (8) - OVERTAKE (Pass)
I thought this might be 'Open' = OVERT + E(xhibition), but that leaves AK for 'Honours' so I think I've gone wrong somewhere.
22a. Difficult old puzzle priest threatening not to complete (10) - ELIMINATOR
It looks like 'Priest' = ELI + 'Threatening' = MINATOR(y), but what is the definition?